Suat Irmak Publications

REFEREED JOURNAL ARTICLES
2021 218. Irmak, S., V. Sharma, A. Haghverdi, A. Jhala, J.O. Payero and M. Drudik. 2021. Alfalfa- and grass-reference crop coefficients for maize under variable and fixed (uniform) rate irrigation and variable rate, fixed rate and pre-plant fertilizer management in three soil types. Agricultural Water Management 243 (2021) 106489. https://doi.org/10.1016/j.agwat.2020.106489.
217. Sharma, V., and S. Irmak. 2021. Comparative analyses of variable and fixed rate irrigation and nitrogen management for maize in different soil types: Part I. Impact on soil-water dynamics and crop evapotranspiration. Agricultural and Water Management https://doi.org/10.1016/j.agwat.2020.106644.
216. Sharma, V., and S. Irmak. 2021. Comparative analyses of variable and fixed rate irrigation and nitrogen management for maize in different soil types: Part II. Plant growth, grain yield, evapotranspiration, production functions and water productivity. Agricultural Water Management 246 (2021) 106653. https://doi.org/10.1016/j.agwat.2020.106653.
215. Sharma, K., S. Irmak and M.S. Kukal. 2021. Propagation of soil moisture sensing uncertainty into estimation of total soil water, evapotranspiration and irrigation decision-making. Agricultural Water Management 243 (2021) 106454. https://doi.org/10.1016/j.agwat.2020.106454.
2020 214. Porter, D., S. Irmak, F. Lamm, T. Marek and Bradley Rein. 2020. Challenges and opportunities for education in irrigation engineering. Transactions of the ASABE 63(5): 1289-1294. https://doi.org/10.13031/trans.13943.
213. Kukal, M.S., and S. Irmak. 2020. Interrelationships among water use efficiency and light use efficiency in four row crop canopies. Agrosystems, Geosciences and Environment 2020;3:e20110. https://doi.org/10.1002/agg2.20110.
212. Kukal, M.S., and S. Irmak. 2020. Canopy light interactions, use and efficiency in four row crops under optimal growth conditions. Agricultural and Forest Meteorology 284 (2020) 107887. https://doi.org/10.1016/j.agrformet.2019.107887.
211. Sharma, V., and S. Irmak. 2020. Economic comparisons of variable rate irrigation and fertigation with fixed (uniform) rate irrigation and fertigation and pre-plant fertilizer management for maize in three soils. Agricultural Water Management 240 (2020) 106307. https://doi.org/10.1016/j.agwat.2020.106307.
210. Ale, S., R.D. Harmel, A.P. Nejadhashemi, K.C. DeJonge, S. Irmak, I. Chaubey and K.R. Douglas-Mankin. 2020 Global water security: Current research and priorities for action. Transactions of the ASABE 63(1):49-55. https://doi.org/10.13031/trans.13839.
209. Kukal, M.S., and Irmak, S. 2020. Characterization of water use and efficiency dynamics across four C3 and C4 row crops under optimal growth conditions. Agricultural Water Management 227:105840. https://doi.org/10.1016/j.agwat.2019.105840.
208. Harmel, R.D., I. Chaubey, S. Ale, A.P. Nejadhashemi, S. Irmak, K. DeJonge, S. Evett, E.M. Barnes, M. Catley-Carlson, S. Hunt and I. Mani. 2020. Perspectives on Global Water Security. Transactions of the ASABE 63(1): 69-80. https://doi.org/10.13031/trans.13524.
207. Sandhu, R., and S. Irmak. Performance of Hybrid-Maize model in simulating maize growth, grain yield, soil water and evapotranspiration under rainfed, limited and full irrigation using long-term field data. Agricultural Water Management 242 (2020) 106402. https://doi.org/10.1016/j.agwat.2020.106402
206. Koehler-Cole, K., R. Elmore, H. Blanco-Canqui, C. Francis, C. Shapiro, C. Proctor, S. Ruis, D. Heeren, S. Irmak and R. Ferguson. 2020. Cover crop productivity and subsequent soybean yield in the Western Corn Belt. Agronomy Journal 112:2649–2663. doi:10.1002/agj2.20232.
205. Kukal, M., and S. Irmak. 2020. Impact of irrigation on interannual variability in United States agricultural productivity. Agricultural Water Management 234:106141. doi.org/10.1016/j.agwat.2020.106141.
204. Salam, A., M.C. Vuran and S. Irmak. 2020. A statistical impulse response model based on empirical characterization of wireless underground channel. IEEE Transactions on Wireless Communications 2020. doi:10.1109/TWC.2020.2998762.
203. Taghvaeian, S., A. Andales, L. Allen, I. Kisekka, S. O’Shaughnessy, D. Porter, R. Sui, S. Irmak, A. Fulton and J. Aguilar. 2020. Irrigation scheduling for agriculture in the United States: The progress made and the path forward. Transactions of the ASABE 63(5):1603-1618. https://doi.org/10.13031/trans.14110.
202. Barnes, E.R., N.C. Lawrence, S.Z. Knezevic, O. Rodrigues, S. Irmak and A.J. Jhala. 2020. Weed control and response of yellow and white popcorn hybrids to herbicides. Agronomy Journal 112(1): 458-469. https://doi.org/10.1002/agj2.20029.
201. Barnes, E., N. Lawrence, S. Knezevic, S. Irmak, O. Rodriguez and A. Jhala. 2020. Dose response of white and yellow popcorn hybrids to glyphosate, a premix of 2,4-D choline/glyphosate, or dicamba. ,Agronomy Journal https://doi.org/10.1002/agj2.20190.
200. Irmak, S., A.T. Mohammed, W.L. Kranz, C.D. Yonts and S. van Donk. 2020. Irrigation-yield production functions and irrigation water use efficiency response of drought-tolerant and non-drought-tolerant maize hybrids under different irrigation levels, population densities and environments. Sustainability 12(358):1-28. doi:10.3390/su12010358.
199. Kukal, M., S. Irmak, H. Walia and L. Odhiambo. 2020. Spatial and temporal performance, calibration and validation of Hargreaves-Samani equation for quantification of grass-reference evapotranspiration in the USA Great Plains. Agronomy Journal 2020:1–16. https://doi.org/10.1002/agj2.20325.
198. Barnes, E., S. Knezevic, N. Lawrence, S. Irmak, O. Rodriguez and A. Jhala. 2020. Control of Velvetleaf (Abutilon theophrasti) at two heights with post-emergence herbicides in Nebraska popcorn. Weed Technology 1-8. doi:10.1017/wet.2020.14.
197. Kukal, M., and S. Irmak. 2020. Evidence of arithmetical uncertainty in estimates of light and water use efficiency in four row crops. Sustainability 12(2271):1-9. doi:10.3390/su12062271.
196. Kukal, M.S., S. Irmak and K. Sharma. 2020. Development and application of a performance and operational feasibility guide to facilitate adoption of soil moisture sensors. Sustainability 12(321):1-20. doi:10.3390/su12010321.
195. Sharma, V., C. Nicholoson, A. Bergantino, S. Irmak and D. Peck. 2020. Temporal analysis of meteorological variables and reference evapotranspiration in inter-mountain region of Wyoming. Water 12(2159):1-35. doi:10.3390/w12082159.
2019 194. Irmak, S., and M. Kukal. 2019. Disk-till vs. no-till maize grass- and alfalfa-reference single (normal) and basal crop coefficients. Agricultural Water Management 226:105815. https://doi.org/10.1016/j.agwat.2019.105815.
193. Kukal, M., and S. Irmak. 2019. Irrigation-limited yield gaps: Trends and variability in the United States post-1950. Environmental Research Communications 1:061005. https://doi.org/10.1088/2515-7620/ab2aee.
192.  Irmak, S., M.S. Kukal, A.T. Mohammed, and K. Djaman. 2019. Disk-till vs. no-till maize evapotranspiration, microclimate, grain yield, production functions and water productivity. Agricultural Water Management 26(5):177-195. https://doi.org/10.1016/j.agwat.2019.02.006.
191.  Irmak, S., A.T. Mohammed, and W.L. Kranz. 2019. Grain yield, crop and basal evapotranspiration, production functions and water productivity response of drought-tolerant and non-drought-tolerant maize hybrids under different irrigation levels, population densities and environments: Part II. In south-central and northeast Nebraska’s transition zone and sub-humid environments. Applied Engineering in Agriculture 35(1):83-102. https://doi.org/10.13031/aea.12871.
190.  Sandhu, R., and S. Irmak. 2019. Performance of AquaCrop model in simulating maize growth, yield, and evapotranspiration under rainfed, limited and full irrigation. Agricultural Water Management 223:105687. https://doi.org/10.1016/j.agwat.2019.105687.
189. Sandhu, R., and S. Irmak. 2019. Assessment of AquaCrop model in simulating maize canopy cover, soil-water, evapotranspiration, yield and water productivity for different planting dates and densities under irrigated and rainfed conditions. Agricultural Water Management 224, 105753. https://doi.org/10.1016/j.agwat.2019.105753.
188. Kukal, M., and S. Irmak. 2019. Comparative canopy growth dynamics in four row crops and their relationships with allometric and environmental determinants. Agronomy Journal 111(4):1-18. doi:10.2134/agronj2019.01.0017.
187.  Mohammed, A.T., S. Irmak, W.L. Kranz, S. van Donk, and C.D. Yonts. 2019. Grain yield, crop and basal evapotranspiration, production functions and water productivity response of drought-tolerant and non-drought-tolerant maize hybrids under different irrigation levels, and population densities: Part I. In western Nebraska’s semi-arid environments. Applied Engineering in Agriculture 35(1):65-81. ISSN 0883-8542 https://doi.org/10.13031/aea.12870.
186.  Zhu, Y., S. Irmak, A.J. Jhala, M.C. Vuran, and A. Diotto. 2019. Time-domain and frequency-domain reflectometry type soil moisture sensor performance and soil temperature effect in fine- and coarse-textured soils. Applied Engineering in Agriculture 35(2):117-134. https://doi.org/10.13031/aea.12908.
185. Salam, A., M. Vuran, X. Dong, C. Argyropoulos and S. Irmak. 2019. A theoretical model of underground Dipole Antennas for communications in internet of underground things. IEEE Transactions on Antennas and Propagation 67(6):3996. doi:10.1109/TAP.2019.2902646.
184. Salam, A., M.C. Vuran and S. Irmak. 2019. Di-Sense: In situ real-time permittivity estimation and soil moisture sensing using wireless underground communications. Computer Networks 151:31-41. doi.org/10.1016/j.comnet.2019.01.001.
183. Vuran, M.C., A. Salam, R. Wong, and S. Irmak. 2019. Internet of underground things in precision agriculture: Architecture and technology aspects. Ad Hoc Networks 81:160-173. doi.org/10.1016/j.adhoc.2018.07.017.
182. Brar, D., W.L. Kranz, T. Lo, S. Irmak.  and D.L. Martin. 2019. Conservation of energy using variable frequency drive for center pivot irrigation: Systems equipped with corner watering attachments. Transactions of the ASABE Vol. 62(5): 1395-1408. https://doi.org/10.13031/trans.13312 .
181.  Sharma, V., and S. Irmak. 2019. Spatio-temporal magnitudes and trends of cover-crop evapotranspiration in Nebraska, Iowa and Kansas. J. Irrigation and Drainage Engineering 145(2):04018040. doi:10.1061/(ASCE)IR.1943-4774.0001367.
180. Safa, B., T.J. Arkebauer, Q. Zhu, A. Suyker, and S. Irmak. 2019. Net ecosystem exchange (NEE) simulation in maize using artificial neural networks. Journal of Systems and Control 7(100036):1-10. doi.org/10.1016/j.ifacsc.2019.100036.
179.  Bai, G., Y. Ge, D. Scoby, B. Leavitt, V. Stoerger, N. Kirchgessner, S. Irmak, G. Graef, J. Schnable and T. Awada. 2019. NU-Spidercam: A large-scale, cable-driven, integrated sensing and robotic system for precision phenotyping, remote sensing, and agronomic research. Computers and Electronics in Agriculture 160(5):71-81. https://doi.org/10.1016/j.compag.2019.03.009.
178.  Barnes, E.R., S.Z. Knezevic, N.C. Lawrence, S. Irmak, O. Rodriguez and A. Jhala. 2019. Pre-emergence herbicide delays the critical time of weed removal in popcorn. Weed Technology 1–9 doi: 10.1017/wet.2019.58.
177. Djaman, K., D. Rudnick, Y. Moukoumbi, A. Sow and S. Irmak. 2019. Actual evapotranspiration and crop coefficients of irrigated lowland rice (Oryza sativa L.) under semiarid climate. Ital. J. Agronomy 14(1059):19-25. doi:10.4081/ija.2019.1059.
176. Rudnick, D., S. Irmak, C. West, I. Kisekka, T. Marek, J. Schneekloth, D. Mitchell, D. McCallister, V. Sharma, K. Djaman, J. Aguilar, J. Chávez, M. Schipanski, D. Rogers and A. Schlegel. 2019. Deficit irrigation management of maize in the High Plains Aquifer region: A Review. J. Am. Wat. Resour. Assoc. 55(1):38–55. doi.org/10.1111/1752-1688.12723.
175. Singh, J., T. Lo, D. Rudnick, S. Irmak and H. Blanco-Canqui. 2019. Quantifying and correcting for clay content effects on soil water measurement by reflectometers. Agricultural Water Management 216(5):390-399. https://doi.org/10.1016/j.agwat.2019.02.024.
2018 174. Kukal, M.S., and S. Irmak. 2018. U.S. Agro-climatology in 20th Century: Growing degree days, first and last frost, growing season length, and impacts on crop yields. Nature Scientific Reports 8:6977. doi:10.1038/s41598-018-25212-2.
173. Kukal, M. S., and S. Irmak. 2018. Climate-Driven Crop Yield and Yield Variability and Climate Change Impacts on the US Great Plains Agricultural Production. Nature Scientific Reports, 8(1):3450. 199:138-147.
172. Irmak, S., V. Sharma, A.T. Mohammed, and K. Djaman. 2018. Impacts of cover crops on soil physical properties: Field capacity, permanent wilting point, soil-water holding capacity, bulk density, hydraulic conductivity, and infiltration.Transactions of the ASABE, 61(4):1307-1321.
171. Oliveira, M.C., T. Gaines, E.L. Patterson, A.J. Jhala, S. Irmak, K. Amundsen, and S.Z. Knezevic. 2018. Interspecific and intraspecific metabolism-based herbicide resistance transfer in Dioecious Weedy Amaranthus. The Plant Journal 96(5):1051-1063. doi: 10.1111/tpj.14089.
170. Djaman, P.M. Ndiaye, K. Koudahe, A. Bodian, L. Diop, and S. Irmak. 2018. Spatial and temporal trend in monthly and annual reference evapotranspiration in Madagascar for the 1980 - 2010 period. Int. J. Climatology 2(2):110-120. doi: 10.15406/ijh.2018.02.00058.
169. Yonts, C.D., A. Haghverdi, D.L. Reichert, and S. Irmak. 2018. Deficit irrigation and surface residue cover effects on dry bean yield, in-season soil water content and irrigation water use efficiency in western Nebraska High Plains. Agricultural Water Management 199:138-147.
168. Anderson, R., D. Keshwani, A. Guru, H. Yang, S. Irmak, and J. Subbiah. 2018. An integrated modeling framework for crop and biofuel systems using DSSAT and GREET models. J. Environmental Modelling and Software 108:40-50. doi.org/10.1016/j.envsoft.2018.07.004.
167. Vuran, M.C., A. Salam, R. Wong, and S. Irmak. 2018. Internet of underground things: Sensing and communications on the field for precision agriculture. IEEE Internet of Things (WF-IoT 2018). 307:586-591. doi:10.1109/WF-IoT.2018.8355096.
166. Safa, B., T.J. Arkebauer, Q. Zhu, A. Suyker, and S. Irmak. 2018. Latent heat and sensible heat flux simulation in maize using artificial neural networks. Computers and Electronics in Agriculture 154:155-164. doi.org/10.1016/j.compag.2018.08.038.
165. Sharma, V., S. Irmak, and J. Padhi. 2018. Effect of cover crops on soil quality: Part I: Soil chemical properties – organic C, total N, pH, EC, organic matter content, NO3-N, and P. J. Soil and Water Conservation 73(6):637-651. doi:10.2489/jswc.73.6.637.
164. Sharma, V., S. Irmak, and J. Padhi. 2018. Effect of cover crops on soil quality: Part II. Soil exchangeable bases (K, Mg, Na, Ca) and soil micronutrients (Zn, Mn, Fe, Cu, and B). J. Soil and Water Conservation73(6):652-668. doi:10.2489/jswc.73.6.652
163. Chahal, P., S. Irmak, M. Jugulam, and A. Jhala. 2018. Evaluating effect of degree of water stress on growth and fecundity of Palmer amaranth (Amaranthus palmeri) using soil moisture sensors. Weed Science 66(6):738-745. doi.org/10.1017/wsc.2018.47.
162. Djaman, K., V.C. Mel, .L. Diop, A. Sow, R. El Namaky, B. Manneh, K. Saito, K. Futakuchi, and S. Irmak. 2018. Effects of alternate wetting and drying irrigation regime and nitrogen fertilizer on yield and nitrogen use efficiency of irrigated rice in the Sahel. Water 10:711. doi:10.3390/w10060711.
161. Djaman, K., M. Sall, A. Sow, B. Manneh, and S. Irmak. 2018. Analysis of air temperature and relative humidity measured over rice and grass canopies and their impacts on Penman-Monteith reference evapotranspiration. J. Irrigation and Drainage Engineering 145(1):06018008. doi:10.1061/(ASCE)IR.1943-4774.0001362.
160. Chahal, P.S., S. Irmak, T. Gaines, K. Amundsen, M. Jugulam, P. Jha, I.S. Travlos, and A.J. Jhala. 2018. Control of photosystem (PS) II- and 4-Hydroxyphenylpyruvate Dioxygenase (HPPD)-inhibitor-resistant Palmer amaranth (Amaranthus palmeri S. Wats.) in conventional corn. Weed Technology 32:-326-335. doi:10.1017/wet.2017.111.
159. Djaman, K., M. O'Neill, C. Owen, D. Smeal, K. Koudahe, M. West, S. Allen, K. Lombard, and S. Irmak. 2018. Crop evapotranspiration, irrigation water requirement, and water productivity of maize from meteorological data under semiarid climate. Water 10(405):2-17. doi:10.3390/w10040405.
158. Djaman, K., and S. Irmak. 2018. Evaluation of critical N and P models for maize under full and limited irrigation conditions. Ital. Journal of Agronomy 13(1): 80-92. doi.org/10.4081/ija.2017.958.
157. Djaman, K., K. Lombard, C. Owen, D. Smeal, K. Koudahe, M. West, S. Allen, D. Begay, M. O’Neill, and S. Irmak. 2018. Long-term winter wheat seasonal irrigation amount, evapotranspiration, yield, and water productivity under semiarid climate. Agronomy 8(96):1-16. doi:10.3390/agronomy8060096.
156. Barker, J., D. Heeren, K. Koehler-Cole, C. Shapiro, H. Blanco-Canqui, R.. Elmore, C. Proctor, S. Irmak, C. Francis, T. Shaver, and A. Mohammed. 2018. Soil water storage of cover crops in maize and soybean in Nebraska. Agronomy Journal 110:1-13. doi:10.2134/agronj2017.12.0739.
155. Ringenberg, D., W. Kranz, S. Irmak, and B. Dvorak. 2018. Extending Extension’s Outreach: Efficacy of using student interns to obtain implementation of irrigation improvements. Journal of Extension 56(4):1-6.
2017 154. Kukal, M., and S. Irmak. 2017. Spatial and temporal changes in maize and soybean grain yields, precipitation use efficiency, and crop water use efficiency in the USA Great Plains. Transactions of the ASABE 60(4):1189-1208. doi 10.13031/trans.12072.
153. Aegerter, C., J. Wang, B. Oglesby, S. Irmak, B. Wardlow, H. Yang and Cui Ge. 2017. Mesoscale modeling of the meteorological impacts of irrigation during the 2012 central plains drought. J. Applied Meteorology and Climatology 56:1259-1283. doi: 10.1175/JAMC-D-16-0292.1
152. Haghverdi, A., C.D. Yonts, D.L. Reichert, and S. Irmak. 2017. Impact of irrigation, surface residue cover and plant population on sugarbeet growth and yield, irrigation water use efficiency and soil water dynamics. Irrigation Science 180:1-12. doi.org/10.1016/j.agwat.2016.10.018.
151. Djaman, K., V. Sharma, D. Rudnick, S. Irmak, K.A. Amouzou, J.M. Sogbedji and K.Koudahe. 2017. Spatial and temporal variation in rainfall in Togo during the 1961-2001 period. Int. Journal of Hydrology 1(4): 00019. doi:10.15406/ijh.2017.01.00019.
150. Djaman, K., S. Irmak, M. Sall, A. Sow and I. K. Koudahe, and Kabenge. 2017. Comparison of sum-of-hourly and daily time step standardized ASCE Penman-Monteith (ASCE-PM) grass-reference evapotranspiration in Western Africa. Theoretical and Applied Climatology. doi.org/10.1007/s00704-017-2291-6.
149. Djaman, K., S. Irmak and K. Futakuchi. 2017. Daily reference evapotranspiration estimation under limited data in Eastern Africa. J. Irrigation and Drainage Engineering. doi:10.1061/(ASCE)IR.1943-4774.0001154. 06016015.
148. Sharma, V., and S. Irmak. 2017. Soil-water dynamics, evapotranspiration, and crop coefficients of cover crop mixtures in seed maize-cover crop rotation fields: Part II. Grass- and alfalfa-reference single (normal) and basal crop coefficients. J. Irrigation and Drainage Engineering 143(9): 04017033. doi:10.1061/(ASCE)IR.1943-4774.0001215.
147. Kukal, M., S. Irmak, and A. Kilic. 2017. Long-term spatial and temporal maize and soybean evapotranspiration derived from ground and satellite-based NDVI datasets over the USA Great Plains. J. Irrigation and Drainage Engineering 143(9):04017031. doi:10.1061/(ASCE)IR.1943-4774.0001212.
146. Sarangi, D., A.J. Tyre, E. Patterson, T.A. Gaines, S. Irmak, S.Z. Knezevic, J. Lindquist, and A.J. Jhala. 2017. Pollen-mediated gene flow from glyphosate-resistant common waterhemp: Consequences for the dispersal of resistance genes. Nature Scientific Reports 7:44913. doi:10.1038/srep44913.
145. Djaman, K., K. Kouhade, S. Allen, M. O”Neill, and S. Irmak. 2017. Validation of Valiantzas’ reference evapotranspiration equation under different climatic conditions. Journal of Irigation and Drainage Systems Engineering 6(3): 1-7. doi:10.4172/2168-9768.1000196.
144. Djaman, K., A.B. Balde, K.B. Muller, D. Rudnick and S. Irmak. 2017. Long-term trend analysis in climate variables and agricultural adaptation strategies to climate change in the Senegal River Basin. Int. J. Climatology (Royal Meteorological Society). doi:10.1002/joc.4885.
143. Oliveira, M.C., A. Jhala, T. Gaines, S. Irmak, K. Amundsen, J. Scott and S. Knezevic. 2017. Confirmation and control of HPPD-Resistant Common Waterhemp (Amaranthus rudis) in Nebraska. Weed Technology 31(1): 67-79.
142. Koudahe, K., K. Djaman, A. Bodian, S. Irmak, M. Sall, L. Diop, A.B. Balde, and D.R. Rudnick. 2017. Trend analysis in rainfall, reference evapotranspiration and aridity index in Southern Senegal: Adaptation to the vulnerability of rainfed rice cultivation to climate change. Atmospheric and Climate Sciences 7(4): 476-495. doi.org/10.4236/acs.2017.74035.
141. Sarangi, D., L. Sandell, S.Z. Knezevic, J.L. Lindquist, S. Irmak and A.J. Jhala. 2017. Comparison of herbicide programs for season-long control of glyphosate-resistant common waterhemp (Amaranthus rudis) in soybean. Weed Technology 31:53-66. doi.org/10.1017/wet.2016.1
140. Djaman, K., V.C. Mel, A.B. Balde, B.V. Bado, B. Manneh, L. Diop, D. Mutiibwa, D.R. Rudnick, S. Irmak, and K. Futakuchi. 2017. Evapotranspiration, irrigation water requirement and water productivity of rice (Oryza sativa L.) in the Sahelian environment. Paddy and Water Environment. doi:10.1007/s10333-016-0564-9.
139. Brar, D., W.L. Kranz, T. Lo, S. Irmak and D.L. Martin. 2017. Conservation of energy using variable frequency drive for center pivot irrigation: Standard systems. Transactions of the ASABE 60(1): 95-106. doi:10.13031/trans.11683.
138. Djaman, K., D. Rudnick, D. Mutiibwa, L. Diop, M. Sall, I. Kabenge, A. Bodian, H. Tabari and S. Irmak. 2017. Evaluation of the Valiantzas’ simplified forms of the FAO-56 Penman-Monteith reference evapotranspiration model under humid climate. J. Irrigation and Drainage Engineering. 06017005-1. doi: 10.1061/(ASCE)IR.1943-4774.0001191.
137. Salam, A., M.C. Vuran, and S. Irmak. 2017. Towards internet of underground things in smart lighting: A statistical model of wireless underground channel. ICNSC 2017. IEEE Networking, Sensing and Control. 304:574-579. doi:10.1109/ICNSC.2017.8000155.
136. Sharma, V., S. Irmak, V. Sharma, K. Djaman and L. Odhiambo. 2017. Soil-water dynamics, evapotranspiration and crop coefficients of cover crop mixtures in seed maize-cover crop rotation fields: Part I. Soil-water dynamics and evapotranspiration. J. Irrigation and Drainage Engineering 143(9): 04017032. doi: 10.1061/(ASCE)IR.1943-4774.0001214.
135. Yan, Q., H. Yang, M.C. Vuran, and S. Irmak. 2017. SPRIDE: Scalable and private continual geo-distance evaluation for precision agriculture. IEEE Communications and Network Security. CFP17CNM-ART:1-9. doi:10.1109/CNS.2017.8228620.
134. Rudnick, D., S. Irmak, K. Djaman, and V. Sharma. 2017. Impact of irrigation and nitrogen fertilizer rate on soil water dynamics and maize actual evapotranspiration during the vegetative and reproductive periods. Agricultural Water Management 191:77-84. http://dx.doi.org/10.1016/j.agwat.2017.06.007.
133. Djaman K., K. Koudahe, C.O. Akinbile, S. Irmak. 2017. Evaluation of eleven reference evapotranspiration models in semiarid conditions. Journal of Water Resource and Protection 9:1469-1490. https://doi.org/10.4236/jwarp.2017.912094.
132. Djaman, K., Koudahe, K., Sall, M., Kabenge, I., Rudnick, D., and Irmak S. 2017. Performance of twelve mass transfer based reference evapotranspiration models under humid climate. Journal of Water Resource and Protection 9:1347-1363. https://doi.org/10.4236/jwarp.2017.912086.
2016 131. Irmak, S., and K. Djaman. 2016. Effects of planting date and density on plant growth, yield, evapotranspiration, and irrigation- and evapotranspiration-yield production functions of maize (Zea mays L.) under subsurface drip irrigation and rainfed conditions. Transactions of the ASABE 59(5): 1235-1256. doi:10.13031/trans.59.11169.
130. Salam, A., M.C. Vuran and S. Irmak. 2016. Pulses in the sand: Impulse response analysis of wireless underground channel. IEEE INFOCOM. doi:10.1109/INFOCOM.2016.7524457.
129. Djaman, K., A.B. Balde, L. Diop, K. Futakuchi and S. Irmak. 2016. Analyses, calibration and validation of evapotranspiration models to predict grass-reference evapotranspiration in the Senegal River Delta. Journal of Hydrology 8:82-94. dx.doi.org/10.1016/j.ejrh.2016.06.003.
128. Djaman, K., S. Irmak, I. Kabenge and K. Futakuchi. 2016. Evaluation of FAO-56 Penman-Monteith model with limited data and the Valiantzas models for estimating grass-reference evapotranspiration in the Sahelian conditions. Journal of Irrigation and Drainage Engineering, ASCE. http://0-dx.doi.org.library.unl.edu/10.1061/(ASCE)IR.1943-4774.0001070.
127. Kukal, M., and S. Irmak. 2016a. Long-term patterns of air temperatures, daily temperature range, precipitation, grass-reference evapotranspiration and aridity index in the USA Great Plains: Part I. Spatial trends. Journal of Hydrology, http://dx.doi.org/10.1016/j.jhydrol.2016.06.006. 
126. Kukal, M., and S. Irmak. 2016b. Long-term patterns of air temperatures, daily temperature range, precipitation, grass-reference evapotranspiration and aridity index in the USA Great Plains: Part II. Temporal trends. Journal of Hydrology, http://dx.doi.org/10.1016/j.jhydrol.2016.06.008. 
125. Irmak, S., and G.M. Arellano. 2016. Reference (potential) evapotranspiration: Part II. Frequency distribution in humid, subhumid, arid, semiarid and Mediterranean-type climates. J. Irrigation and Drainage Engineering, ASCE 142(4): 04015066.
124. Arellano, G.M., and S. Irmak. 2016. Reference (potential) evapotranspiration: Part I. Comparison of temperature, radiation, and combination-based energy balance equations in humid, subhumid, arid, semiarid and Mediterranean-type climates. J. Irrigation and Drainage Engineering, ASCE 142(4): 04015065.
123. Sharma, V., S. Irmak, K. Djaman, and V. Sharma. 2016. Large-scale spatial and temporal variability in evapotranspiration, crop water use efficiency, and evapotranspiration water use efficiency for irrigated and rainfed maize and soybean. J. Irrigation and Drainage Engineering, ASCE 142(3):04015063.
122. Sharma, V., A. Kilic, and S. Irmak. 2016. Impact of scale/resolution on evapotranspiration from LANDSAT and MODIS images. Water Resources Research 52: 1-20. doi:10.1002/2015WR017772.
121. Amatya, D.M., S. Irmak, P. Gowda, G. Sun, J.E. Nettles and K.R. Douglas-Mankin. 2016. Ecosystem evapotranspiration: Challenges in measurements, estimates and modeling. Transactions of the ASABE 59(2): 555-560.
120. Wang, J., A.L. Kessner, C. Aegerter, A. Sharma, L. Judd, B. Wardlow, J. You, M. Shulski, S. Irmak, A. Kilic, and J. Zeng, 2016. A multi-sensor view of the 2012 Central Plains drought from space. Front. Environ. Sci., 4(45): 1-13. 20 June, 2016. http://dx.doi.org/10.3389/fenvs.2016.00045.
119. Sharma, V., S. Irmak, A. Kilic, V. Sharma, J.E. Gilley, G.E. Meyer, S.Z. Knezevic and D. Marx. 2016. Quantification and mapping of surface residue cover and tillage practices for maize and soybean fields in south central Nebraska-USA using Landsat imagery. Transactions of the ASABE 59(3):925-939. doi 10.13031/trans.59.11489.
118. Diotto, A.V., and S. Irmak. 2016. Embodied energy and return of investment energy analyses in maize production for grain and ethanol under surface (furrow)-, center pivot- and subsurface drip irrigation with disk-till and no-till practices. Transactions of the ASABE 59(3):873-884. doi 10.13031/trans.59.11331.
117. Irmak, S., K. Djaman, and D.R. Rudnick. 2016. Effect of full and limited irrigation rate and frequency on subsurface drip-irrigated maize evapotranspiration, yield, water use efficiency and yield response factors. Irrigation Science 34(4): 271-286. doi10.1007/s00271-016-0502-z.
116. Rudnick, D.R., S. Irmak, R.B. Ferguson, T. Shaver, K. Djaman, G. Slater, A. Bereuter, N. Ward, D. Francis, M. Schmer, B. Wienhold, and S. Van Donk. 2016. Economic return vs crop water productivity of maize for various nitrogen rates under full irrigation, limited irrigation, and rainfed settings in south central Nebraska. J. Irrigation and Drainage Engineering, ASCE 142(6): 04016017 (p. 1-12). doi: 10.1061/(ASCE)IR.1943-4774.0001023.
2015 115. Irmak, S. 2015a. Inter-annual variation in long-term center pivot-irrigated maize evapotranspiration (ET) and various water productivity response indices: Part I. Grain yield, actual and basal ET, irrigation-yield production functions, ET-yield production functions, and yield response factors. J. Irrigation and Drainage Engineering, ASCE 141(5): 04014068-1-17. DOI: 10.1061/(ASCE)IR.1943-4774.0000825.
114. Irmak, S. 2015b. Inter-annual variation in long-term center pivot-irrigated maize evapotranspiration (ET) and various water productivity response indices: Part II. Irrigation water use efficiency (IWUE), crop WUE, evapotranspiration WUE, irrigation-evapotranspiration use efficiency, and precipitation use efficiency. J. Irrigation and Drainage Engineering, ASCE 141(5): 04014069-1-11. DOI: 10.1061/(ASCE)IR.1943-4774.0000826.
113. Irmak, S., and V. Sharma. 2015. Large scale and long-term trends and magnitudes in irrigated and rainfed maize and soybean water productivity: Grain yield, evapotranspiration, crop water use efficiency, and yield production functions. Transactions of the ASABE 58(1): 103-120.
112. Irmak, S., K. Djaman, and V. Sharma. 2015. Winter wheat (Triticum aestivum L.) evapotranspiration and single and basal crop coefficients. Transactions of the ASABE 58(4):1047-1067.
111. Irmak, S., J.E. Specht, L.O. Odhiambo, J.M. Rees, and K.G. Cassman. 2015. Soybean yield, water productivity, evapotranspiration and soil-water extraction response to subsurface drip irrigation. Transactions of the ASABE 57(3):729-748. DOI 10.13031/trans.57.10085.
110. Mitchell, J.P., A. Shrestha and S. Irmak. 2015. Trade-offs between winter cover crop production and soil water depletion in California’s San Joaquin Valley. J. Soil and Water Conservation 70(6):430-440. doi:10.2489/jswc.70.6.430.
109. Sharma, V., S. Irmak, A. Kilic, and D. Mutiibwa. 2015. Application of SEBS for quantifying and mapping surface energy fluxes in south central Nebraska, USA: Analyses with respect to field measurements. Transactions of the ASABE 58(5):1265-1285.
108. Odhiambo, L.O., and S. Irmak. 2015. Surface energy balance, evapotranspiration, and surface coefficients during non-growing season in a maize-soybean cropping system. Transactions of the ASABE 58(3):667-684.
107. Sarangi, D., S. Irmak, J.L. Lindquist, S.Z. Knezevic, and A.J. Jhala. 2015. Effect of water stress on growth and fecundity of glyphosate–resistant and –susceptible Common Waterhemp. Weed Science 64:42-52.
106. Rudnick, D.R., K. Djaman, and S. Irmak. 2015. Performance and hysteresis analyses of capacitance and electrical resistance sensors in a silt-loam soil. Transactions of the ASABE 58(3):649-665.
105. Djaman, K., A.B. Balde, A. Sow, B. Muller, S. Irmak, M.K. Ndiaye, B. Manneh, Y.D. Moukoumbi, K. Futakuchi, and K. Saito. 2015. Evaluation of sixteen reference evapotranspiration methods under sahelian conditions in the Senegal River Valley. Journal of Hydrology 3:139-159.
104. Odhiambo, L., and S. Irmak. 2015. Relative evaporative losses and water balance in subsurface drip- and center pivot-irrigated soybean fields. J. Irrigation and Drainage Engineering, ASCE 141(11):1-17. 04015020.
103. Rudnick, D.E., V. Sharma, G.E. Meyer, and S. Irmak. 2015. Using fuzzy logic to predict and evaluate the impact of temporal and spatial precipitation on rainfed maize and soybean yields in Nebraska. Transactions of the ASABE 58(5):1215-1229.
2014 102. Sarangi, D., L. D. Sandell, S.Z. Knezevic, J.S. Aulakh, J.L. Lindquist, S. Irmak, A.J. Jhala. 2014. Conformation and control of Glyphosate-resistant Common Waterhemp (Amaranthus rudis) in Nebraska. Weed Technology 29:82-92. DOI: 10.1614/WT-D-14-00090.1.
101. Rudnick, D.R. and S. Irmak. 2014. Spatial and temporal maize soil-water extraction (depletion) dynamics: Part I. Development and evaluation of a soil water-extraction model. Transactions of the ASABE 57(2): 431-444.
100. Rudnick, D.R. and S. Irmak. 2014. Spatial and temporal maize soil-water extraction (depletion) dynamics: Part II. Impact of water and nitrogen management strategies on soil-water extraction. Transactions of the ASABE 57(2): 445-462.
99. Mutiibwa, D., A. Kilic, and S. Irmak. 2014. The effect of land cover/land use changes on the regional climate of the U.S.A. High Plains. Climate 2(3):153-167 doi:10.3390/cli2030153.
98. Torrion, J.A., T.D. Setiyono, G.L. Graef, K.G. Cassman, S. Irmak, and J.E. Specht. 2014. Agronomic impacts of deferred, deficit, and full-season irrigation strategies. Crop Science 54:1-14. November-December. doi: 10.2135/cropsci2014.03.0261.
97. Rudnick, D.R., and S. Irmak. 2014. Impact of nitrogen fertilizer on maize evapotranspiration crop coefficients under fully-irrigated, limited irrigation, and rainfed settings. J. Irrigation and Drainage Engineering, ASCE 10.1061/(ASCE)IR,1943-4774.0000778,0401403.
96. Rudnick, D.R., and S. Irmak. 2014. Implementation of a soil water extraction model on a spatial domain using field capacity and apparent electrical conductivity relationships. Transactions of the ASABE 57(5): 1359-1373.
95. Irmak, S., K.E. Skaggs, and S. Chatterjee. 2014. A review of the Bowen ratio surface energy balance method for quantifying evapotranspiration and other surface energy fluxes. Transactions of the ASABE 57(6):1657-1674.
94. Irmak, S., A. Kilic, and S. Chatterjee. 2014. On the uncertainty in inequality of latent and sensible heat energy transfer coefficients of the Bowen ratio theory: Another look at the potential causes of inequalities. Climate 2:181-205, doi:10.3390/cli2030181.
93. Irmak, S., J.O. Payero, A. Kilic, L. Odhiambo, V. Sharma, D. Rudnick, and D. Billesbach. 2014. On the magnitude and dynamics of eddy covariance residual energy (energy closure) from a subsurface drip-irrigated maize field during growing and non-growing (dormant) seasons. Irrigation Science 32:471-483. doi 10.1007/s00271-014-0443-3.
2013 92. Irmak, S., L.O. Odhiambo, J.E. Specht, and K. Djaman. 2013. Hourly and daily single and basal evapotranspiration crop coefficients as a function of growing degree days, days after emergence, leaf area index, fractional green canopy cover, and plant phenology for soybean. Transactions of the ASABE 56(5):1785-1803.
91. Irmak, S., I. Kabenge, I., D. Rudnick, S. Knezevic, D. Woodward, and M. Moravek. 2013. Evapotranspiration crop coefficients for mixed riparian plant community and transpiration crop coefficients for phragmites, cottonwood and peach-leaf willow in the Platte River Basin, Nebraska-USA. Journal of Hydrology 481:177-190.
90. Irmak, S., D. Mutiibwa, J.O. Payero, T. Marek, and D. Porter. 2013. Modeling canopy resistance on hourly time steps from micrometeorological and plant variables for one-step estimation of actual crop evapotranspiration. Journal of Hydrology 507:1-18. dx.doi.org/10.1016/j.jhydrol.2013.10.008.
89. Mutiibwa, D., and S. Irmak. 2013. AVHRR-NDVI-based crop coefficients for analyzing long-term trends in evapotranspiration in relation to changing climate in the USA High Plains. Water Resources Research 49(1):231-244. doi:10.1029/2012WR012591.
88. Rudnick, D.R., and S. Irmak. 2013. Impact of water and nitrogen management strategies on maize yield and water productivity indices under linear-move sprinkler irrigation. Transactions of the ASABE 56(5):1769-1783.
87. Payero, J.O., and S. Irmak. 2013. Daily energy fluxes, evapotranspiration and crop coefficients of soybean. Agricultural Water Management 129:31-43.
86. Mutiibwa, D., and S. Irmak. 2013. Transferability of Jarvis-type models developed/re-parameterized for specific crops to estimate stomatal resistance for other crops: Analyses on model calibration, validation, performance, sensitivity, and elasticity. Transactions of the ASABE 56(2):409-422.
85. Kabenge, I., S. Irmak, G.E. Meyer, J.E. Gilley, S. Knezevic, T.J. Arkebauer, D. Woodward, and M. Moravek. 2013. Evapotranspiration and surface energy balance of a common reed-dominated riparian system in the Platte River Basin, central Nebraska, USA. Transactions of the ASABE 56(1):135-153.
84. Djaman, K., S. Irmak, D.L. Martin, R.B. Ferguson, and M.L. Bernards. 2013. Plant nutrient uptake and soil nutrient dynamics under full and limited irrigation and rainfed maize production. Agronomy Journal 105(2): 527-538. doi:10.2134/agronj2012.0269
83. Djaman, K., and S. Irmak. 2013. Actual crop evapotranspiration and alfalfa- and grass-reference crop coefficients of maize under full and limited irrigation and rainfed conditions. J. Irrigation and Drainage Engineering, ASCE 139(6):433-446.
82. Djaman, K., S. Irmak, W.R. Rathje, D. Martin, and D. Eisenhauer. 2013. Maize evapotranspiration, yield production functions, biomass, grain yield, harvest index, and yield response factors under full and limited irrigation. Transactions of the ASABE 56(2):273-293.
81. Sharma, V., D.R. Rudnick, and S. Irmak. 2013. Development and evaluation of ordinary least square regression models for predicting irrigated and rainfed maize and soybean yields. Transactions of the ASABE 56(4):1361-1378.
80. Dong, X., M.C. Vuran, and S. Irmak. 2013. Autonomous precision agriculture through integration of wireless underground sensor networks with center pivot systems. Ad Hoc Networks 11(7):1975-1987. dx.doi.org/10.1016/j.adhoc.2012.06.012.
79. Knezevic, S., R. Rapp, A. Datta, and S. Irmak. 2013. Common reed (Phragmites australis) control as influenced by the timing of herbicide application. Int. Journal of Pest Management 59(3): 224-228. doi:10.1080/09670874.2013.830796.
78. Lagos, L.O., D.L. Martin, S.B. Verma, S. Irmak, A. Irmak, D.E. Eisenhauer, and A. Suyker. 2013. Surface energy balance model of transpiration and evaporation from residue-covered or bare-soil systems: Model evaluation. Irrigation Science 31(2):135-150. DOI10.1007/s00271-011-0298-9.
2012 77. Irmak, S., I. Kabenge, K. Skaggs, and D. Mutiibwa. 2012. Trend and magnitude of changes in climate variables and reference evapotranspiration over 116-year period in the Platte River Basin, central Nebraska-USA. Journal of Hydrology 420-421: 228-244.
76. Skaggs, K.E., and S. Irmak. 2012. Long-term trends in air temperature distribution and extremes, growing degree days, and spring and fall frosts for climate impact assessments on agricultural practices in Nebraska, USA. Journal of Applied Meteorology and Climatology 51:2060ñ2073.doi:dx.doi.org/10.1175/JAMC-D-11-0146.1
75. Kabenge, I., and S. Irmak. 2012. Evaporative losses from a phragmites (common reed)-dominated peach-leaf willow and cottonwood riparian plant community. Water Resources Research 48, W09513, doi:10.1029/2012WR011902.
74. Irmak, S., M.J. Burgert, H.S. Yang, K.G. Cassman, D.T. Walters, W.R. Rathje, J.O. Payero, P. Grassini, M.S. Kuzila, K.J. Brunkhorst, B. Van DeWalle, J.M. Rees, W.L. Kranz, D.E. Eisenhauer, C.A. Shapiro, G.L. Zoubek and G.J. Teichmeier. 2012. Large scale on-farm implementation of soil moisture-based irrigation management strategies for increasing maize water productivity. Transactions of the ASABE 55(3): 881-894.
73. Sharma, V., and S. Irmak. 2012. Mapping spatially-interpolated precipitation, reference evapotranspiration, actual crop evapotranspiration, and net irrigation requirements: Part I. Precipitation and reference evapotranspiration. Transactions of the ASABE 55(3): 907-921.
72. Sharma, V., and S. Irmak. 2012. Mapping spatially-interpolated precipitation, reference evapotranspiration, actual crop evapotranspiration, and net irrigation requirements: Part II. Actual crop evapotranspiration and net irrigation requirements. Transactions of the ASABE 55(3): 923-936.
71. Djaman, K., and S. Irmak. 2012. Soil water extraction patterns and crop-, irrigation-, and evapotranspiration water use efficiency of maize under full and limited irrigation and rainfed settings. Transactions of the ASABE 55(4):1223-1238.
70. Skaggs, K.E., and S. Irmak. 2012. Analysis of microclimate data measured over grass and soybean canopy and their impacts on Penman-Monteith grass and alfalfa-reference evapotranspiration. J. Irrigation and Drainage Engineering, ASCE 138(2): 120-134.
69. Odhiambo, L.O., and S. Irmak. 2012. Evaluation of the impact of surface residue cover on single and dual crop coefficient methods for estimating soybean actual evapotranspiration. Agricultural Water Management 104:221-234.
68. Torrion, J., T. Setiyono, K. Cassman, R. Ferguson, S. Irmak, and J. Specht. 2012. Soybean root development relative to vegetative and reproductive phenology. Agronomy Journal 104(6):1702-1709.
67. Porter, D., P. Gowda, T. Marek, T. Howell, J. Moorehead, and S. Irmak. 2012. Sensitivity of grass and alfalfa-reference evapotranspiration to sensor accuracy. Applied Engineering in Agriculture 28(4): 543-549.
66. Rapp, R.E., A. Datta, S. Irmak, T. Arkebauer, and S.Z. Knezevic. 2012. Integrated management of common reed (Phragmites australis) along the Platte River in Nebraska. Journal of Weed Technology 26(2): 326-333.
65. Tooker, J., X. Dong, M.C., Vuran, and S. Irmak. 2012. Connecting soil to the cloud: A wireless underground sensor network testbed. IEEE Ad Hoc Communications and Networks (SECON). 978-1-4673-1905-8/12: p. 79-81.
2011 64. Irmak, S. 2011. On the dynamics of Nocturnal, Daytime, and Sum-of-Hourly Evapotranspiration and Other Surface Energy Fluxes over Nonstressed Maize Canopy. Journal of Irrigation and Drainage 137(8): 475-490.
63. Irmak, S., L.O. Odhiambo, and D. Mutiibwa. 2011. Assessing the impact of daily net radiation models on grass and alfalfa-reference evapotranspiration estimated using Penman-Monteith equation in a sub-humid and arid climate. J. Irrigation and Drainage Engineering, ASCE 137(2):59-72.
62. Mutiibwa, D., and S. Irmak. 2011. On the scaling up soybean leaf level stomatal resistance to canopy resistance for one-step estimation of actual evapotranspiration. Transactions of the ASABE 54(1):141-154.
61. Grassini, P., H. Yang, S. Irmak, J. Thorburn, C. Burr, and K.G. Cassman. 2011. High-yield irrigated maize in Western U.S. Corn-Belt II. Irrigation management and crop water productivity. Field Crops Research 120:133-141.
60. Odhiambo, L.O., and S. Irmak. 2011. Evaluation of Extended Shuttleworth-Wallace Model for estimating and partitioning of evapotranspiration in a partial residue-covered subsurface drip-irrigated soybean field. Transactions of the ASABE 54(3):915-930.
59. Skaggs, K.E., and S. Irmak. 2011. Characterization of nighttime evapotranspiration and other surface energy fluxes and interactions with microclimate variables in subsurface drip and center pivot-irrigated soybean fields. Transactions of the ASABE 54(3):941-952.
58. Sharma, V., A. Irmak, I. Kabenge, and S. Irmak. 2011. Application of GIS and Geographically-Weighted Regression to evaluate spatial non-stationarity relationships between precipitation vs. irrigated and rainfed maize and soybean yields. Transactions of the ASABE 54(3):953-972.
57. Abunyewa, A.A., R.B. Ferguson, C.S. Wortmann, D.J. Lyon, S.C. Mason, S. Irmak, and R.N. Klein. 2011. Grain sorghum water use with skip-row configuration in the Central Great Plains. A. J. Agric. Res. 6(23): 5328-5338.
2010 56. Irmak, S., and D. Mutiibwa. 2010. On the dynamics of canopy resistance: Generalized-linear estimation and relationships with primary micrometeorological variables. Water Resources Research 46:1-20, W08526, doi: 10.1029/2009WR008484
55. Irmak, S. 2010. Nebraska Water and Energy Flux Measurement, Modeling, and Research Network (NEBFLUX). Transactions of the ASABE 53(4):1097-1115.
54. Irmak, S., D. Mutiibwa, and J.O. Payero. 2010. Net radiation dynamics: Performance of 20 daily net radiation models as related to model structure and intricacy in two climates. Transactions of the ASABE 53(4):1059-1076.
53. Irmak, A., P. Ranade, D. Marx, S. Irmak, K.G. Hubbard, G.E. Meyer, and D.L. Martin. 2010. Spatial interpolation of climate variables in Nebraska. Transactions of the ASABE 53(6):1759-1771.
52. Irmak, S., J.M. Rees, G.L. Zoubek, B.S. VanDeWalle, W.R. Rathje, R. DeBuhr, D. Leininger, D.D. Siekman, J.W. Schneider, and A.P. Christiansen. 2010. Nebraska Agricultural Water Management Demonstration Network (NAWMDN): Integrating Research and Extension/Outreach. Applied Engineering in Agriculture 26(4):599-613.
51. Hay, C.H., and S. Irmak. 2010. Recursive and explicit combination-based energy balance equations for calculating reference evapotranspiration in relation to Bowen ratio measurements. Transactions of the ASABE 53(6):1799-1810.
50. Van Donk, S.J., D.L. Martin, S. Irmak, S.R. Melvin, J.L. Petersen, and D.R. Davison. 2010. Crop residue cover effects on evaporation, soil water content, and yield of deficit-irrigated corn in west-central Nebraska. Transactions of the ASABE 53(6):1787-1797.
2009 49. Irmak, S., and D. Mutiibwa. 2009. On the dynamics of stomatal resistance: Relationships between stomatal behavior and micrometeorological variables and performance of Jarvis-type parameterization. Transactions of the ASABE 52(6): 1923-1939.
48. Irmak, S., and D. Mutiibwa. 2009. On the dynamics of evaporative losses from Penman-Monteith with fixed and variable canopy resistance during partial and complete maize canopy. Transactions of the ASABE 52(4):1139-1153.
47. Irmak, S., and L.O. Odhiambo. 2009. Impact of microclimatic data measured above maize and grass canopies on Penman-Monteith reference evapotranspiration calculations. Transactions of the ASABE 52(4):1155-1169.
46. Lagos, O., D.L. Martin, S. Verma, A. Suyker, and S. Irmak. 2009. Surface energy balance model of transpiration from variable canopy cover and evaporation from residue-covered or bare soil systems. Irrigation Science 28:51-64.
45. Ortega-Farias, S., S. Irmak, and R.H. Cuenca. 2009. Special issue on evapotranspiration measurement and modeling. Irrigation Science 28:1-3.
44. Hay, C.H., and S. Irmak. 2009. Actual and reference evaporative losses and surface coefficients of a maize field during non-growing (dormant) periods. Journal of Irrigation and Drainage Engineering 135(3):313-322.
43. Payero, J.O., D.D. Tarkalson, S. Irmak, D. Davison, and J. Petersen. 2009. Effect of timing of a deficient-irrigation allocation on corn evapotranspiration, yield, water use efficiency, and dry mass. Agricultural Water Management 96:1387-1397.
2008 42. Irmak, S., and D. Mutiibwa. 2008. Dynamics of photosynthetic photon flux density and light extinction coefficient for assessing radiant energy interactions for maize canopy. Transactions of the ASABE 51(5):1663-1673.
41. Irmak, S., D. Mutiibwa, A. Irmak, T.J. Arkebauer, A. Weiss, D.L. Martin, and D.E. Eisenhauer. 2008. On the scaling up leaf stomatal resistance to canopy resistance using photosynthetic photon flux density. Agricultural and Forest Meteorology 148:1034-1044.
40. Irmak, A., S. Irmak, and D.L. Martin. 2008. Reference and crop evapotranspiration in south central Nebraska: I. Comparison and analysis of grass and alfalfa-reference evapotranspiration. J. Irrig. and Drain. Eng., ASCE 134(6):690-699.
39. Irmak, A., and S. Irmak. 2008. Reference and crop evapotranspiration in south central Nebraska: II. Measurement and estimation of actual evapotranspiration. J. Irrig. and Drain. Eng., ASCE 134(6):700-715.
38. Irmak, S., A. Irmak, T.A. Howell, D.L. Martin, J.O. Payero, and K.S. Copeland. 2008. Variability of alfalfa-reference to grass-reference evapotranspiration ratios in growing and dormant seasons. J. Irrig. and Drain. Eng., ASCE 134(2):147-159.
37. Irmak, S., E. Istanbulluoglu, and A. Irmak. 2008. An evaluation of evapotranspiration model complexity versus performance in comparison with Bowen ratio energy balance measurements. Transactions of the ASABE 51(4):1295-1310.
36. Singh, R.K., A. Irmak, S. Irmak and D.L. Martin. 2008. Application of SEBAL for mapping evapotranspiration and estimating surface energy fluxes in south central Nebraska. J. Irrig. and Drain. Eng. ASCE 134(3):273-285.
35. Payero, J.O., D.D. Tarkalson, and S. Irmak, D. Davison, and J.L. Petersen. 2008. Effect of irrigation amounts applied with subsurface drip irrigation on crop evapotranspiration, yield, water use efficiency, and dry matter production in a semi-arid climate. Agricultural Water Management 95:895-908.
2007 34. Payero, J.O. and S. Irmak. 2007. Design, construction, installation, and performance of two large repacked weighing lysimeters for measuring crop evapotranspiration. Irrigation Science 26(2):191-202.
2006 33. Irmak, A., J.W. Jones, W.D. Batchelor, S. Irmak, K.J. Boote, and J.O. Paz. 2006. Artificial neural network model as a data analysis tool in precision farming. Transactions of the ASABE 49(6):2027-2037.
32. Irmak, A., J.W. Jones, W.D. Batchelor, S. Irmak, J.O. Paz, and K.J. Boote. 2006. Analysis of spatial yield variability using a combined crop model-empirical approach. Transactions of the ASABE 49(3):811-818.
31. Irmak, S., J.O. Payero, D.L. Martin, A. Irmak, and T.A. Howell. 2006. Sensitivity analyses and sensitivity coefficients of the standardized ASCE-Penman-Monteith equation to climate variables. Journal of Irrigation and Drainage Engineering 132(6):564-578.
30. Payero, J.O. and S. Irmak. 2006. Variable upper and lower crop water stress index (CWSI) baselines for corn and soybean. Irrigation Science 25:21-32.
29. Payero, J.O., D.D. Tarkalson, and S. Irmak. 2006. Use of Time-Domain Reflectometry for continuous monitoring of nitrate in soil and water. Applied Engineering in Agriculture 22(5):689-700.
28. Xinhua, J., M.D. Dukes, J.M. Jacobs, and S. Irmak. 2006. Large scale weighing lysimeters for evapotranspiration research in a humid environment. Transactions of the ASABE 49(2):401-412.
27. Payero, J.O., S.R. Melvin, S. Irmak, and D. Tarkalson. 2006. Yield response of corn to deficit irrigation in a semi-arid environment. Agricultural Water Management. 84:101-112. UNL-ARD Journal Series No. 14687.
2005 26. Payero, J.O., S.R. Melvin, and S. Irmak. 2005. Response of soybean to deficit irrigation in the semi-arid environment of West-Central Nebraska. Transactions of the ASAE. 48(6):2189-2203. UNL-ARD Journal Series No. 14637.
25. Irmak, S. and A. Irmak. 2005. Performance of Frequency-Domain, Capacitance, and Psuedo-Transit Time-Based Soil Water Content Probes in Four Coarse-Textured Soils. Applied Engineering in Agriculture, ASAE. 21(6):999-1008. UNL-ARD Journal Series No. 14993.
24. Irmak, S. 2005. Closure on predicting daily net radiation using minimum climatological data. J. Irrig. and Drain. Eng., ASCE 131(4):389-390.
23. Irmak, S., T.A. Howell, J.O. Payero, and D.L. Martin. 2005. Standardized ASCE-Penman-Monteith: Impact of sum-of-hourly vs. 24-hr-timestep computations at reference weather station sites. Transactions of the ASAE 48(3):1063-1077. UNL-ARD Journal Series No. 14850.
22. Irmak, S., D.Z. Haman, A. Irmak, J.W. Jones, B. Tonkinson, D. Burch, T.H. Yeager, and C. Larsen. 2005. Root-zone temperatures of V. odoratissimum grown in the MPBS and Conventional Systems: Measurement and analyses of temperature profiles and predicting root-zone temperatures. J. Amer. Soc. Hort. Sci. 40(3):808-818. UNL-ARD Journal Series No. 14851.
21. Irmak, S. 2005. Crop evapotranspiration and crop coefficients of Viburnum Odoratissimum (Ker-gawl). Applied Engineering in Agriculture, ASAE 21(3):1-11.
20. Irmak, S., M.D. Dukes, and J.M. Jacobs. 2005. Using modified Bellani plate evaporation gauges to estimate short canopy reference evapotranspiration. J. Irrig. and Drain. Eng., ASCE 131(2):164-175. UNL-ARD Journal Series No. 14609.
2004 19. Irmak, S., D. Z. Haman, A. Irmak, J. W. Jones, K.L. Campbell, and T. L. Crisman. 2004. Measurement and analyses of growth and stress parameters of Viburnum Odoratissimum (Ker-gawl) grown in MPBS. J. Amer. Soc. Hort Sci. 39(6):1445-1455. 70:51-65.
18. Satti, S.R., J.M. Jacobs, and S. Irmak. 2004. Agricultural water management in a humid region: sensitivity to climate, soil and crop parameters. Agric. Water Management 70:51-65.
2003 17. Irmak, S. and E.B. Whitty. 2003. Daily grass and alfalfa-reference evapotranspiration estimates and alfalfa-to-grass evapotranspiration ratios in Florida. Journal of Irrigation and Drainage Engineering, ASCE 129(5):360-370.
16. Irmak, S., A. Irmak, J.W. Jones. T.A. Howell, J.M. Jacobs, and G. Hoogenbom. 2003. Predicting daily net radiation using minimum climatological data. Journal of Irrigation and Drainage Engineering, ASCE 129(4):256-269.
15. Irmak, S., A. Irmak, and J.W. Jones. 2003. Solar and net radiation-based equations to estimate reference evapotranspiration in humid climates. Journal of Irrigation and Drainage Engineering, ASCE 129(5):336-347.
14. Irmak, S., D. Z. Haman, A. Irmak, J. W. Jones, K. L. Campbell, and T. H. Yeager. 2003. New irrigation-plant production system for water conservation in ornamental nurseries: Quantification and evaluation of irrigation, runoff, plant biomass, and irrigation efficiencies. Applied Engineering in Agriculture 19(6):651-655.
13. Irmak, S., and D.Z. Haman. 2003. Evaluation of five methods for estimating Class "A" pan evaporation in a humid climate. HortTechnology 13(3):500-508.
12. Irmak, S., A. Irmak, and J.W. Jones. 2003. Predicting multiple layers of bare soil temperatures: A model evaluation and modifications for sandy soils. Soil and Crop Science Society of Florida 62:20-29.
2002 11. Irmak, S., D.Z. Haman, and J.W. Jones. 2002. Evaluation of Class "A" pan coefficients for estimating reference evapotranspiration in a humid location. Journal of Irrigation and Drainage Engineering, ASCE 128(3):153-159.
10. Irmak, A., W.D. Batchelor, J.W. Jones, S. Irmak, J.O. Paz, H. Beck, and M. Engel. 2002. Relationship between plant available soil water and yield for explaining soybean yield variability. Applied Engineering in Agriculture, ASAE, 18(4):471-482.
9. Irmak, S., and D.Z. Haman. 2001. Performance of the Watermark Granular Matrix Sensor in sandy soils. Applied Engineering in Agriculture, ASAE 17(6):787-795.
8. Irmak, S., D.Z. Haman, and A. Irmak. 2001. Dew point hygrometers for irrigation scheduling in fine-textured soils. Applied Engineering in Agriculture, ASAE 17(1):17-25.
2001 7. Irmak, S., D.Z. Haman, and T.H. Yeager. 2001. Seasonal irrigation water use efficiency of MPB System. Journal of Environmental Horticulture 19(1):4-10.
2000 6. Irmak, S., D.Z. Haman, and R. Bastug. 2000. Determination of crop water stress index for irrigation timing and yield estimation of corn. Agronomy Journal 92(6):1221-1227.
1999 5. Irmak,A., J.W. Jones, C.D. Stanley, J.W. Hansen, S. Irmak, and K.J. Boote. 1999. Some effects of an antitranspirant (Vapor Gard) on tomato growth and yield. Proc. Soil and Crop Science Society of Florida, 58:118-122.
1998 4. Haman, D.Z., S. Irmak, T.H. Yeager, R.C. Beeson, Jr., and G.W. Knox. 1998. Multipot box and funneled containers in container nursery production. Proceedings of the Florida State Horticultural Society, 111:39-41.
1996 3. Bastug, R. and S. Irmak. 1996. Using soil matric potential and crop water stress index for irrigation management. Mediterranean University, Journal of Agriculture (9):241-255, Antalya, Turkey.
1995 2. Bastug, R. and S. Irmak. 1995. Measuring leaf water potential using thermocouple hygrometers and psychrometers. Mediterranean University, Journal of Agriculture (8):383-394. Antalya, Turkey.
1. Hakgoren, F., A. Irmak, and S. Irmak. 1995. Cooling of greenhouses. Mediterranean University, Journal of Agriculture (8):238-252. Antalya, Turkey.
REFEREED EXTENSION/EDUCATIONAL PUBLICATIONS
2019 58. Irmak, S. 2019. Soil-water potential and soil-water content concepts and measurement methods. Extension Circular EC3046. 18 pp
57. Irmak, S. 2019. Perspectives and considerations for soil moisture sensing technologies and soil water content- and soil matric potential-based irrigation trigger values Extension NebGuide 3045. 8 pp.
2018 56. Irmak, S. 2018. Subirrigation in agricultural fields. Nebraska Extension Circular EC3038. 5 pp.
55. Irmak, S. 2018. Long-term (1893-2012) changes in monthly, growing season and annual precipitation trends and magnitudes in central Nebraska. Nebraska Extension Circular EC717. 12 pp
54. Kukal, M., and S. Irmak. 2018. Patterns and magnitudes of spatial and temporal changes in precipitation and aridity across 800 Great Plains Counties. UNL Extension Circular EC3025. 17 pp.
53. Lo, T.H., D. Rudnick, Y. Ge, D.M Heeren, S. Irmak, J.B. Barker, X. Qiao, and T. Shaver. 2018. Ground-based thermal sensing for irrigation management. UNL Extension NebGuide G2301. 7 pp.
52. Martin, D., W. Kranz, T. Smith, S. Irmak, C. Burr, and R. Yoder. 2018. Center pivot irrigation handbook. UNL Extension Circular EC3017. 134 pp.
2017 51. Irmak, S. 2017. Estimating crop evapotranspiration from reference evapotranspiration and crop-specific coefficients. UNL Extension NebGuide G1994. 9 pp.
50. Irmak, S. 2017. Simplified forms of deep percolation below the crop root zone estimation method for silt-loam soils. University of Nebraska-Lincoln Extension Circular EC 3015. 7 pp.
49. Irmak, S. 2017. Simplified forms of surface run-off estimation method for silt-loam soils. University of Nebraska-Lincoln Extension Circular EC3016. 5 pp.
48. Kukal, M., and S. Irmak. 2017. Spatial and temporal changes in grass-reference evapotranspiration across 800 US Great Plains counties from 1968 to 2013. UNL Extension Circular EC3022. 11 pp.
47. Kukal, M., and S. Irmak. 2017. Patterns and magnitudes of spatial and temporal changes in precipitation and aridity across 800 Great Plains Counties. UNL Extension Circular EC3025.
46. Van DeWalle, B., A. Nygren, C. Burr, G. Zoubek, and S. Irmak. 2017. Agricultural water management guide.
45. Specht, J., T. Hoegemeyer, G. Graef, L. Ruff, J. Torrion, P. Grassini, J. Edreira, F. Tenorio, B. Farmaha, J. Miller, T. Shaver, C. Wortman, C. Shapiro, B. Krienke, S. Knezevic, A. Jhala, G. Krueger, R. Werle, C. Procter, H. Blanco, R. Elmore, S. Irmak, R. Wright, T. Hunt, L. Giesler, T. Ziems, M. Shulski, A. Dutcher, S. Cooper, K. Glewen, N. Mueller, J. Rees and L. Thompson. 2017. Nebraska soybean and corn pocket field guide. University of Nebraska-Extension. pp. 378.
44. Rees, J., J. Specht, R. Elmore, L. Giesler, T. Hunt, S. Irmak, A. Jhala, R. Klein, N. Mueller, C. Shapiro, A. Vyhnalek, and R. Wright. 2017. Planting soybean after soybean (Part 1): Planting considerations. University of Nebraska-Extension, CropWatch. April 13, 2017.
43. Rees, J., R. Elmore, L. Giesler, T. Hunt, S. Irmak, A. Jhala, R. Klein, N. Mueller, C. Shapiro, J. Specht, A. Vyhnalek, and R. Wright. 2017. Planting soybean after soybean (Part 2): In-season management considerations. University of Nebraska-Extension, CropWatch. April 13, 2017.
2016 42. Irmak, S., V. Sharma, and K. Djaman. 2016. Winter wheat (Triticum aestivum L.) evapotranspiration (crop water use) and crop coefficients. University of Nebraska-Lincoln Extension Circular EC 3005. 7 pp.
41. Kukal, M., and S. Irmak. 2016. Observed space and time changes in air tem­peratures and daily temperature range for the counties in the U.S. Great Plains from 1968 to 2013. University of Nebraska-Lincoln Extension Circular EC3009. 12 pp.
40. Rudnick, D.R., S. Irmak, A. Haghverdi, C.A. Burr, T.M. Shaver, and T.J. Door. 2016. Soil-water sensors for irrigation management. University of Nebraska-Lincoln Extension Circular EC3002. 9 pp.
39. Irmak, S. 2016. Impacts of extreme heat stress and increased soil temperature on plant growth and development. University of Nebraska-Extension, CropWatch. June 21, 2016.
38. Rees, J., Jackson-Ziems, T.,T. Williams, T. Hoegemeyer, P. Grassini, R. Elmore, K. Glewen, S. Irmak, and J. McMechan. 2016. Harvest 2016 — When corn yields are below expectations. University of Nebraska-Extension, CropWatch. October 14, 2016.
37. Sharma, V., and S. Irmak. 2016. Long-term spatio-temporal variation of soybean evapotranspiration across Nebraska. University of Nebraska-Lincoln Extension Circular EC2011. 8 pp.
2015 36. Sharma, V., and S. Irmak. 2015. Spatial and temporal corn evapotranspiration across Nebraska. University of Nebraska-Lincoln Extension Circular EC2010. 9 pp.
35. Irmak, S., and K. Djaman. 2015. Basic soil and water resources and irrigation engineering/agricultural water management and related terminology. University of Nebraska-Lincoln Extension Circular EC2009. 26 pp.
34. Rudnick, D., and S. Irmak. 2015. E3A-IE.I: Irrigation Efficiency. Multi-state Extension publication series. No. B1264. University of Nebraska-Lincoln, Montana State University, University of Wyoming, and Western SARE Sustainable Agriculture Research & Education. 28 pp.
33. Kranz, W., C. Burr, B. Farmaha, P. Grassini, G. Hergert, S. Irmak, D. Martin, A. Nygren, C. Shapiro, T. Shaver, and G. Zoubek. 2015. Irrigation and nitrogen management: User education/certification Program. University of Nebraska-Lincoln Extension Circular EC2008. 117 pp.
32. Henning, J., S. Slack, M. Harrington, R. Shepard, B. Benham, T. Blewett, D. Devlin, V. Dupuis, C. Evensen, A. Fares, A. Gold, J. Hafer, S. Irmak, M. McFarland, S. Megdal, N. Mesner, T. Obreza, M. O'Neill, D. Osmond, D. Parker, P. Rees, P. Robinson, A. Shober, M. Silitonga, D. Swackhamer, D. LaDon Swann, and R. Waskom. 2014. National Initiative on the Improvement of U.S. Water Security: Recommendations of the Water Working Group representing the nation's Land Grant Institutions. National Water Working Group: Report and Recommendations. Prepared by Association of Public and Land-Grant Universities (APLU); Extension Committee on Organization and Policy (ECOP); and Experiment Station Committee on Organization and Policy (ESCOP). August 2014. P. 1-20.
2014 31. S. Irmak, J.O. Payero, B. VanDeWalle, J. Rees, G. Zoubek, D.L. Martin, W.L. Kranz, D.E. Eisenhauer and D. Meininger. 2014. Principles and operational characteristics of Watermark granular matrix sensor to measure soil water status and its practical applications for irrigation management in various soil textures. University of Nebraska-Lincoln Extension Circular EC783.
30. Kranz, W.L., S. Irmak, D.L. Martin, T.M. Shaver, and S. Van Donk. 2014. Variable rate application of irrigation water with center pivots. University of Nebraska-Lincoln Extension Circular EC2000.
29. Irmak, S. 2014. Plant growth and yield as affected by wet soil conditions due to flooding or over-irrigation. <http://extensionpublications.unl.edu/assets/pdf/g1904.pdf">University of Nebraska-Lincoln Extension NebGuide G1904.
28. Irmak, S. 2014. Potential (reference) and actual evapotranspiration trends across U.S. High Plains in relation to irrigation development and climate change. University of Nebraska-Lincoln Extension Circular EC712.
27. Irmak, S., L.O. Odhiambo, W.L. Kranz, and D.E. Eisenhauer. 2014. Irrigation efficiency and uniformity, and crop water use efficiency. University of Nebraska-Lincoln Extension Circular EC732.
26. Martin, D.L., S. Irmak, W.L. Kranz, S. Van Donk, T. Smith, and J. Shanahan. 2014. Crop water use. Crop Insight. 24(8):1-3. Pioneer-DuPont Agronomy Sciences.
25. Martin, D.L., S. Irmak, W.L. Kranz, S. Van Donk, T. Smith, and J. Shanahan. 2014. Measuring soil water content. Crop Insight. 24(7):1-4. Pioneer-DuPont Agronomy Sciences.
24. Rees et al. 2014. Nebraska On-Farm Research Network: Grower’s interactive guide to on-farm research. Nebraska Extension publication
23. Martin, D.L., T. Smith, W.L. Kranz, S. Irmak, S. Van Donk, and J. Shanahan. 2014. Soil water management. Crop Insight. 24(6):1-4. Pioneer-DuPont Agronomy Sciences.
22. Irmak, S. and D.R. Rudnick. 2014. Corn irrigation management under water-limiting conditions. University of Nebraska-Lincoln Extension Circular EC2007.
21. Irmak, S. and D.R. Rudnick. 2014. Corn soil-water extraction and effective rooting depth in a silt-loam soil. University of Nebraska-Lincoln Extension NebGuide G2245.
20. Irmak, S. and V. Sharma. 2014. Spatial and temporal variability of precipitation across Nebraska. University of Nebraska-Lincoln Extension Circular EC2002.
19. Irmak, S. and V. Sharma. 2014. Monthly, Seasonal and annual Spatial and Temporal Variability of Reference (Potential) Evapotranspiration across Nebraska. University of Nebraska-Lincoln Extension Circular EC2003.
2013 18. Irmak, S. 2013. Long-term (1893-2012) changes in air temperature, relative humidity and vapor pressure deficit (atmospheric evaporative demand) in central Nebraska. University of Nebraska-Lincoln Extension Circular EC716.
17. Skaggs, K. and S. Irmak. 2013. Climate change impact on air temperature, daily temperature range, growing degree days, and spring and fall frost dates in Nebraska. University of Nebraska-Lincoln Extension Circular EC715.
16. Grassini, P., H.S. Yang, S. Irmak, J.M. Rees, and K.G. Cassman. 2012. Yield gaps and input-use efficiency of high-yield irrigated corn in Nebraska. University of Nebraska-Lincoln Extension Circular EC106.
2012 15. Grassini, P., H.S. Yang, S. Irmak, J.M. Rees, and K.G. Cassman. 2012. Evaluation of water productivity and irrigation efficiency in Nebraska corn production. University of Nebraska-Lincoln Extension Circular EC105.
2011 14. Irmak, S., and K.E. Skaggs. 2011. Variability of reference evapotranspiration across Nebraska. University of Nebraska-Lincoln Extension Circular EC733.
2010 13. Hoffman, G.J., S. Irmak, W.L. Kranz, C.D. Yonts, D.L. Martin, and S.J. van Donk. 2010. Water quality criteria for irrigation. University of Nebraska-Lincoln Extension Circular EC782.
2009 12. Irmak, S. 2009. Magnitude and trends of reference evapotranspiration rates in south central Nebraska: Daily, monthly, growing season total and annual total. University of Nebraska-Lincoln Extension Circular EC765.
11. Irmak, S. 2009. Estimating crop evapotranspiration from reference evapotranspiration and crop coefficients. University of Nebraska-Lincoln Extension NebGuide G1994.
2008 10. Kranz, W.L, S. Irmak, S. van Donk, C.D. Yonts, and D.L. Martin. 2008. Irrigation management for corn. University of Nebraska-Lincoln Extension NebGuide G1850.
9. Kranz, W.L., D.L. Martin, S. Irmak, S. van Donk, and C.D. Yonts. 2008. Minimum center pivot design capacities in Nebraska. University of Nebraska-Lincoln Extension NebGuide G1851.
2007 8. Irmak, S. 2007. Drip irrigation design and management considerations for windbreaks. University of Nebraska-Lincoln Extension NebGuide G1739.
7. Irmak, S., D.R. Hay, B.E. Anderson, W.L. Kranz, and C.D. Yonts. 2007. Irrigation management and crop characteristics of alfalfa. University of Nebraska-Lincoln Extension NebGuide G1778.
6. Kranz, W.L., S. Irmak, D. L. Martin, and C.D. Yonts. 2007. Flow control devices for center pivot irrigation systems. University of Nebraska-Lincoln Extension NebGuide G888.
5. Kranz, W.L., S. Irmak, D.L. Martin, and C.D. Yonts. 2007. Converting center pivot sprinkler packages. University of Nebraska-Lincoln Extension NebGuide G1124.
2006 4. _______2006. Ten easy ways to boost profit $20/acre. University of Nebraska-Lincoln Extension Circular EC196.
2005 3. Payero, J.O., C.D. Yonts, S. Irmak, and D.D. Tarkalson. 2005. Subsurface drip irrigation: Advantages and disadvantages. University of Nebraska-Lincoln Extension Circular EC776.
2. Irmak, S., J.O. Payero, and D.L. Martin. 2005. Modified atmometers (ETgage) for irrigation management. University of Nebraska-Lincoln Extension NebGuide, G05-1579.
2003 1. Irmak, S., and D.Z. Haman. 2003. Evapotranspiration: Potential or reference? Institute of Food and Agricultural Sciences, IFAS, University of Florida. Extension Publication No: ABE343 (AE256).
SMART PHONE APPS DEVELOPMENT for EXTENSION/OUTREACH PROGRAMS
2013 2. Crop Water App. 2013 (Lead author). The Crop Water App was developed for iPhone and iPad provides an easy way to estimate soil water status based on Watermark soil matric potential sensors installed at soil depths of 1, 2, and 3 feet. With these sensor readings, the app will estimate the crop water used as well as what available soil water is remaining in the profile for typical Nebraska soils. The user can also see historic sensor readings and graph the data. https://itunes.apple.com/us/app/crop-water/id557926049?mt=8.
2015 1. CornSoyWater App. 2015 (Co-author). A web and mobile app, CornSoyWater helps irrigators determine in real-time the available soil water in a particular field and when to irrigate. The program currently covers Nebraska and its surrounding states and will be expanded to other states later. CornSoyWater combines CornWater and SoyWater, two separate irrigation decision support tools developed by Nebraska researchers. Using real-time weather data and field specific crop information provided by the user, CornSoyWater uses simulation to track (from planting to current date) crop water use, water inputs from rainfall and past irrigation, soil available water to the maximum rooting depth, and possible crop water stress. http://hprcc-agron0.unl.edu/cornsoywater/.
BOOK CHAPTERS
2018 3. Mutiibwa, D., A. Kilic, and S. Irmak. 2018. Identifying changes in trends of summer air temperatures of the USA High Plains. Book Chapter In Water Challenges of Urbanizing World. M. Glavan (Ed.). Chapter 9. pp. 145-161. InTech Publications. http://dx.doi.org/10.5772/intechopen.71788. London, United Kingdom (invited).
2011 2. Payero, J., and S. Irmak. 2011. Actual evapotranspiration, crop coefficient, and energy-balance components of surface-irrigated corn. In Evapotranspiration: From Measurements to Agricultural and Environmental Applications. INTECH Publisher, pp. 59-78 (invited).
2007 1. Irmak, S. Evapotranspiration. 2008. In Encyclopedia of Ecology. Manuscript No. 270. Sven Erik Jorgensen and Brian D. Fath, (eds). Encyclopedia of Ecology, First Edition, Elsevier B.V., Oxford. Elsevier. pp. 1432-1439. Invited.
PROFESSIONAL SOCIETY CONFERENCE TECHNICAL/SCIENTIFIC PAPERS
2018 50. G. Bai, Y. Ge, B. Leavitt, J.A.Gamon, Y. Qi, T. Awada, G. Graef, S. Irmak, J.C. Schnable, D. Scoby, and V. Stoerger. 2018. Capturing diurnal variation of phenotypic traits for breeding plots using UNL Field Phenotyping Facility (Abstract). December 10-14, 2018. AGU Fall Meeting. Washington, DC, USA.
49. Naser, M., R. Ferguson, B. Krienke, S. Irmak, D. Rudnick, T. Shaver, C. Shapiro, and K. Glewen. 2018. Can the integration of a crop sensor and crop model be used to determine timing and rate of nitrogen fertigation? Proc. Great Plains Soil Fertility Conference, March 6-7, Denver, CO.
2017 48. Kranz, B., D. Brar, Tsz Lo, S. Irmak, and D. Martin. 2017. Energy conservation using variable-frequency drives for center pivot irrigation. Central Plains Irrigation Conference. pp. 155-166. February 21-22, 2017. Burlington, CO.
47. Martin, D., W. Kranz, S. Irmak, D. Rudnick, C. Burr, and S. Melvin. 2017. Pumping plant performance. Central Plains Irrigation Conference. pp. 167-187. February 21-22, 2017. Burlington, CO.
46. Rudnick, D., S. Irmak, C. Ray, J. Schneekloth, M. Schipanski, I. Kisekka, A. Schlegel, J. Aguilar, D. Rogers, D. Mitchell, C. West, T. Marek, Q. Xue, W. Xu, and D. Porter. 2017. Deficit irrigation management of corn in the High Plains: A Review. Central Plains Irrigation Conference. pp. 66-84. February 21-22, 2017. Burlington, CO.
2016 45. Sarangi, D., S.Z. Knezevic, J.L. Lindquist, S. Irmak and A.J. Jhala. 2015. Pollen-mediated gene flow from Glyphosate-resistant to -susceptible Common Waterhemp under field conditions. (Abstract). North Central Weed Science Society (NCWSS) Annual Meeting. December 7-10, 2015. Indianapolis, IN.
2014 44. Sarangi, D., L.D. Sandell, S.Z. Knezevic, J.S. Aulakh, J.L. Lindquist, S. Irmak, and A.J. Jhala. 2014. Glyphosate-resistant common waterhemp in Nebraska: confirmation and control in soybean. Proc. of the 69th Annual Meeting of the North Central Weed Science Society held at Minneapolis, Minnesota. Dec 1-4, 2014.
43. Aegerter, C., J. Wang, C. Ge, A. Kessner, A. Sharma, L. Judd, B. Wardlow, J. You, M. Shulski, S. Irmak, and A. Kilic. 2014. Modeling and Satellite Remote Sensing of the Meteorological Effects of Irrigation during the 2012 Central Plains Drought. 2014. American Geophysical Union (AGU) Annual Conference. December 15-19, San Francisco, USA (abstract).
42. Eisenhauer, D.E., J Deck, A. Volkmer, S. Irmak, J. Gates, D. Martin, and J. Gibson. 2014. Percolation of water beneath crop root zones of center-pivot irrigated tilled and no-till fields in South Central Nebraska. Paper No. 141914240.
41. Volkmer, A., J. Deck, D. Eisenhauer, S. Irmak, J. Gates, D. Martin, and L.O. Odhiambo. 2014. Hydraulic conductivity land use coefficients for no-till and tilled row crops. Paper No. 141913882.
40. Volkmer, A., D. Eisenhauer, J. Deck, S. Irmak, J. Gates, D. Martin, and L.O. Odiambo. 2014. Curve numbers of hydrologic soil Groups B and C for long-term no-till agriculture. Paper No. 141913816.
39. Amatya, D., G. Sun, P. Gowda, J. de Jong, J. Nettles, S. Basu, and S. Irmak. 2014. Evapotranspiration: Challenges in measurement and modeling from leaf to the landscape scale and beyond. An ASABE International Symposium: Raleigh, NC, April 07-10, 2014.
2013 38. Ferguson, R., M. Schmer, T. Shaver, B. Wienhold, S. Van Donk, S. Irmak, D. Rudnick, N. Ward, V. Jin, D. Francis, A. Bereuter, L. Hendrickson. 2013. Variable rate irrigation and nitrogen fertilization of maize across landscape positions. International Society of Precision Agriculture (J. Stafford, Ed.) Proceedings of the European Conference on Precision Agriculture: Conference of the International Society for Precision Agriculture. pp. 729-736.
2012 37. McKinney, M.B., D. E. Eisenhauer, S. Irmak, J. E. Gilley, W. L. Kranz, and D. L. Martin. 2012. Dynamics of depression storage during sprinkler irrigation and precipitation events. Proc. of the 2012 Annual ASABE International Conference. Dallas, TX, July 29-August 3, 2012.
36. Safa, B., T. Arkebauer, A. Suyker, and S. Irmak. 2012. Modeling Carbon Dioxide Flux over a Cropland Using Artificial Neural Networks. American Meteorological Society. 30th Conference on Agricultural and Forest Meteorology/First Conference on Atmospheric Bio-geosciences. May 30, 2012. Boston, MA.
35. Ferguson, F., T. Shaver, N. Ward, S. Irmak, S. Van Donk, D. Rudnick, B. Wienhold, M. Schmer, V. Jin, D. Francis, V. Adamchuk, and L. Hendrickson. 2012. Landscape influences on soil nitrogen supply, and water holding capacity for irrigated corn. Proc. of the International Society of Precision Agriculture. July 15-18, Indianapolis, IN, USA.
34. Irmak, S. 2012. Effective water management strategies to improve crop water productivity. Proc. 6th World Water Forum. March 12-16, 2012. Marseille, France.
33. Zoubek, G., S. Irmak, J. Rees, and B. VanDeWalle. 2012. Nebraska Agricultural Water Management Network Update. Proc. 24th Annual Central Plains Irrigation Conference, Colby, KS. February 21-22, 2012. Available from CPIA, 760 N. Thompson, Colby, Kansas.
2010 32. Deck, J.H., D.E. Eisenhauer, and S. Irmak. 2010. Infiltration and run-off under center pivots with no-till planting. Paper No. 9215. Proc. 5th Decennial Irrigation Conference. ASABE and Irrigation Association. December 5-8, Phoenix, AZ.
31. Eisenhauer, D.E., J.H. Deck, S. Irmak, P. Jasa, and D.L. Martin. 2010. Green and Ampt infiltration parameters under no-till center pivots. Paper No. 9245. Proc. 5th Decennial Irrigation Conference. ASABE and Irrigation Association. December 5-8, Phoenix, AZ.
30. Eisenhauer, D.E., J.H. Deck, and S. Irmak. 2010. Deep percolation under center pivots with no-till. Paper No. 9257. Proc. 5th Decennial Irrigation Conference. ASABE and Irrigation Association. December 5-8, Phoenix, AZ.
29. Irmak, A., I. Ratcliffe, P. Ranade, S. Irmak, J. Kjaersgaard, B. Kamble, R. Choragudi, K. G. Hubbard, R. Singh, D. Mutiibwa, and N. Healey. 2010. Seasonal Evapotranspiration Mapping Using Landsat Visible and Thermal Data with an Energy Balance Approach in Central Nebraska. Proc. Remote Sensing and Hydrology. Jackson Hole, Wyoming, USA, September 2010.
28. Irmak, A., I. Ratcliffe, S. Irmak, P. Ranade, J. Kjaersgaard, B. Kamble, K. Hubbard, and D. Mutiibwa. 2010. Growing season evapotranspiration with satellite remote sensing procedure. American Geophysical Union (AGU) Annual International Meeting. December 14-18. San Francisco, California, USA. (Abstract).
27. Akasheh, O.Z., A. Irmak, S. Irmak, I. Ratcliffe, R. Singh, P. Ranade, and P.H. Gowda. 2010. Comparison of evapotranspiration from two remote sensing-based surface energy models in south central Nebraska. Proceedings of the Remote Sensing and Hydrology. Jackson Hole, Wyoming, USA, September 2010; IAHS Publ. 3XX, 2011.
26. Irmak, A., I. Ratcliffe, P. Ranade, S. Irmak, J. Kjaersgaard, B. Kamble, R. Choragudi, K. G. Hubbard, R. Singh, D. Mutiibwa, and N. Healey. 2010. Seasonal Evapotranspiration Mapping Using Landsat Visible and Thermal Data with an Energy Balance Approach in Central Nebraska. Proc. Remote Sensing and Hydrology. Jackson Hole, Wyoming, USA, September 2010; IAHS Publ. 3XX, 2011.
25. Ferguson, R., G. Slater, D. Krull and S. Irmak. 2009. Nitrate leaching potential from slow and controlled release nitrogen fertilizer application to irrigated corn. Proc. North Central Extension/Industry Soil Fertility Conference. November 12-13, Des Moines, IA.
2009 24. Torrion, J., T.D. Setiyono, J.E. Specht, K.G. Cassman, R.B. Ferguson, D.T. Walters and S. Irmak. Predicting soybean root growth by water depletion in the soil profile (abstract). Presented at the 2009 ASA Annual Conference, New Orleans, LA, October 17-21, 2009.
23. Hay, C.H., and S. Irmak. 2009. Bayesian model averaging for accounting for model selection uncertainty with an application for predicting net radiation. ASABE paper No. 09-. 2009 ASABE Annual International Meeting, Grand Sierra Resort and Casino, Reno, Nevada, June 21-24, 2009.
22. Hay, C.H., and S. Irmak. 2009. Recursive and explicit combination methods for calculating reference evapotranspiration. Proc. of the 2009 World Environmental and Water Resources Congress. Kansas City, Kansas, May 12-16, 2009.
2008 21. Shock, C., S. Irmak, B. Sanden, L. Lima, and K. Taylor. 2008. Grower adoption of Granular Matrix Sensors. American Society of Agronomy International Meeting. Soil and Water Management and Conservation Division. Houston, Texas. Technical abstract (Abstract ID#: 45774), October 5-9, 2008.
20. Van Donk, S., D.L. Martin, S. Irmak, S. Melvin, and J. Petersen. 2008. Effect of crop residue on soil water content and yield of sprinkler-irrigated corn. ASABE Paper No. 08-4724. 2008 ASABE Annual International Meeting, Providence, Rhode Island, June 29-July 2, 2008.
19. Hay, C.H., and S. Irmak. 2008. Surface energy balance and surface coefficients of a corn field during non-growing periods. Proc. of the 2008 World Environmental and Water Resources Congress. Honolulu, Hawaii, May 12-16, 2008.
2007 18. Irmak, S., D. Mutiibwa, A. Irmak, T.J. Arkebauer, A. Weiss, D.L. Martin, and D.E. Eisenhauer. 2007. Scaling up of leaf stomatal resistance to canopy resistance. ASABE Paper No. 07-2297. 2007 ASABE Annual International Meeting, Minneapolis, Minnesota, June 17-20, 2007.
17. Lagos, L.O., D.L. Martin, S. Irmak, and X. Zhou. 2007. Evaluating evapotranspiration with SWAT, a distributed watershed model, and the FAO56 Penman-Monteith method. ASABE Paper No. 07-2294. 2007 ASABE Annual International Meeting, Minneapolis, Minnesota, June 17-20, 2007.
16. Yang, H., K. Cassman, S. Irmak, and D. Walters. 2007. Corn water use efficiency with deficit irrigation in high-yielding settings. Proc. of the 2007 ASA Annual International Meeting. New Orleans, Louisiana, November 4-8, 2007.
15. Irmak, S., G.L. Zoubek, J.M. Rees, and B.S. Van DeWalle. 2007. Nebraska Agricultural Water Management Demonstration Network. Proc. of the NACAA AM/PIC Conference. Grand Rapids, Michigan.
14. Singh, R.K., A. Irmak, S. Irmak, and D.L. Martin. 2007. The satellite-remote sensing based estimation of land surface evapotranspiration in Great Plains. Proc. of the ASCE-EWRI Word Environmental Water Resources Congress. Tampa, Florida. May 15-19, 2007.
2006 13. Ferguson, R.B. and S. Irmak. 2006. In-season nitrogen management for subsurface drip-irrigated corn in south central Nebraska. 36th North Central Extension-Industry Soil Fertility Conference. Des Moines, Iowa, November 7-8, 2006.
12. Ferguson, R.B., and S. Irmak. 2006. In-season nitrogen management of sub-surface drip irrigated corn. In ASA-CSSA-SSSA 2006 International Meetings. Indianapolis, IN.
11. Payero, J.O., D. Tarkalson, and S. Irmak. 2006. Yield Response of Corn to Timing of a Limited Seasonal Irrigation Depth (150 mm) with Subsurface Drip Irrigation. Proceedings of the ASCE-EWRI World Environmental and Water Resources Congress. Qwest Center, Omaha, Nebraska, May 21-25, 2006.
10. Payero, J.O., D. Tarkalson, and S. Irmak. 2006. Corn Yield Response to Different Irrigation Depths with Subsurface Drip Irrigation. Proceedings of the ASCE-EWRI World Environmental and Water Resources Congress. Qwest Center, Omaha, Nebraska, May 21-25, 2006.
9. Haman D.Z., C. Cornejo, T.H. Yeager and S. Irmak. 2005. Use of Multipot Box System for Container Production of Perennial Plants - ASAE Annual International Meeting - Paper Number : 054058 - American Society of Agricultural Engineers, 2950 Niles Road, Saint Joseph, MI 49085-9659 USA.
2004 8. Dukes, M.D., S. Irmak, and J.M. Jacobs. 2004. An Automatic System for Recording Evaporation from ET Gages. ASAE Annual International Meeting, Fairmont Chateau Laurier, The Westin, Government Centre Ottawa, Ontario, Canada. ASAE Paper No. 042191. St. Joseph, MI, August 1-4, 2004.
2001 7. Irmak, S., and D.Z. Haman. 2001. Evaluation of the FAO56-Penman-Monteith equation for humid climates. ASAE Paper No. 01-2096. Amer. Soc. Agric. Engr., St. Joseph, MI.
2000 6. Irmak, S., and D.Z. Haman. 2000. Performance of the Watermark Granular Matrix Sensor in sandy soils. ASAE Paper No. 00-2037. Amer. Soc. Agric. Engr., St. Joseph, MI.
1999 5. Irmak, S., D.Z. Haman, A.G. Smajstrla, and R. Bastug. 1999. Measurement of soil water potential using soil hygrometer for irrigation timing of corn. ASAE Paper No. 99-2236. St. Joseph, MI.
4. Irmak, S., D.Z. Haman, and A.G. Smajstrla. 1999. Continuous water content measurements with time domain reflectometry for sandy soils. Proc. Soil and Crop Science Soc. Florida 58:77-81.
3. Haman, D.Z., T.H. Yeager, and S. Irmak. 1999. Multi-Pot Box System for increased efficiency of irrigation in ornamental plant production. The Irrigation Association Conference, pp. 223-228. Orlando, FL
1998 2. Irmak, A., J.W. Jones, C.D. Stanley, J.W. Hansen, S. Irmak, and C.D. Stanley. 1998. The effects of antitranspirant (Vapor Gard) on tomato growth and yield. Annual International Agronomy Meetings, Baltimore, 18 22 Oct. (abstract)
1. Haman, D.Z., T.H. Yeager, S. Irmak, and C. Larsen. 1998. Container plant production in MPBS. SNA Research Conference, Atlanta, GA 43:113 116.