BSE - Suat Irmak Publications

 

REFEREED JOURNAL ARTICLES
2017 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.
  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.
  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.
  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
  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.
  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.
  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.
  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.
  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.
  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
  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.
  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.
  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.
2016 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..
  Salam, A., M.C. Vuran and S. Irmak. 2016. Pulses in the sand: Impulse response analysis of wireless underground channel. IEEE INFOCOM 2016. DOI: 10.1109/INFOCOM.2016.7524457.
  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.
  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.
  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. 
  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. 
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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
  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.
  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 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.
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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 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.
  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.
  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.
  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.
  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.
  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.
  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.
2013 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.
  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.
  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.
  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.
  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.
  Payero, J.O., and S. Irmak. 2013. Daily energy fluxes, evapotranspiration and crop coefficients of soybean. Agricultural Water Management 129:31-43.
  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.
  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.
  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
  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.
  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.
  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.
  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 11:1975-1987.
  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.
  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 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.
  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
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  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.
  Tooker, J., X. Dong, M.C., Vuran, and S. Irmak. 2012. Connecting soil to the cloud: A wireless underground sensor network testbed. 2012 9th Annual IEEE Communications Soc. Conf. on Sensor, Mesh and Ad Hoc Communications and Networks (SECON) . 978-1-4673-1905-8/12: p. 79-81.
2011 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.
  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.
  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.
  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.
  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.
  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.
  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.
  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 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
  Irmak, S. 2010. Nebraska Water and Energy Flux Measurement, Modeling, and Research Network (NEBFLUX). Transactions of the ASABE 53(4):1097-1115.
  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.
  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.
  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.
  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.
  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 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.
  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.
  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.
  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.
  Ortega-Farias, S., S. Irmak, and R.H. Cuenca. 2009. Special issue on evapotranspiration measurement and modeling. Irrigation Science 28:1-3.
  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.
  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 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.
  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.
  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.
  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.
  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.
  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.
  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.
  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 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 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.
  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.
  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.
  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.
  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.
  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.
  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 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.
  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.
  Irmak, S. 2005. Closure on predicting daily net radiation using minimum climatological data. J. Irrig. and Drain. Eng., ASCE 131(4):389-390.
  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.
  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.
  Irmak, S. 2005. Crop evapotranspiration and crop coefficients of Viburnum Odoratissimum (Ker-gawl). Applied Engineering in Agriculture, ASAE 21(3):1-11.
  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 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.
  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 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.
  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.
  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.
  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.
  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.
  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 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.
  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.
  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.
  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 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 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 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 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 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 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.
  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 AND REPORTS
2017 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.
  Irmak, S. 2017. Simplified forms of surface run-off estimation method for silt-loam soils. University of Nebraska-Lincoln Extension Circular EC3016. 5 pp.
  Van DeWalle, B., A. Nygren, C. Burr, G. Zoubek, and S. Irmak. 2017. Agricultural water management guide.
  Specht, J., T. Hoegemeyer, G. Graef, L. Ruff, J. Torrion, P. Grassini, J.I.R. Edreira, F.A. 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.
  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.
  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 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.
  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.
  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.
  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.
  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.
  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 Sharma, V., and S. Irmak. 2015. Spatial and temporal corn evapotranspiration across Nebraska. University of Nebraska-Lincoln Extension Circular EC2010. 9 pp.
  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.
  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.
  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.
  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 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.
  Center Pivot Management Handbook. 2014. Increasing the value of water through management: A collaborative program between Nebraska, T-L Irrigation, Reinke, Valmont Industries, and Lindsay. Nebraska Extension Publication.
  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.
  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.
  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.
  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.
  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.
  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.
  Rees et al. 2014. Nebraska On-Farm Research Network: Grower’s interactive guide to on-farm research. Nebraska Extension publication
  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.
  Irmak, S. and D.R. Rudnick. 2014. Corn irrigation management under water-limiting conditions. University of Nebraska-Lincoln Extension Circular EC2007.
  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.
  Irmak, S. and V. Sharma. 2014. Spatial and temporal variability of precipitation across Nebraska. University of Nebraska-Lincoln Extension Circular EC2002.
  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 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.
  Irmak, S. 2013. Long-term (1893-2012) changes in monthly, growing season and annual precipitation trends and magnitudes in central Nebraska. University of Nebraska-Lincoln Extension Circular EC717.
  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.
  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 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 Irmak, S., and K.E. Skaggs. 2011. Variability of reference evapotranspiration across Nebraska. University of Nebraska-Lincoln Extension Circular EC733.
2010 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 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.
  Irmak, S. 2009. Estimating crop evapotranspiration from reference evapotranspiration and crop coefficients. University of Nebraska-Lincoln Extension NebGuide G1994.
2008 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.
  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 Irmak, S. 2007. Drip irrigation design and management considerations for windbreaks. University of Nebraska-Lincoln Extension NebGuide G1739.
  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.
  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.
  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 _______2006. Ten easy ways to boost profit $20/acre. University of Nebraska-Lincoln Extension Circular EC196.
2005 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.
  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 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 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 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:
2011 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 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:
2014 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.
  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).
  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.
  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.
  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.
  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 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 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.
  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.
  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.
  Irmak, S. 2012. Effective water management strategies to improve crop water productivity. Proc. 6th World Water Forum. March 12-16, 2012. Marseille, France.
  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 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.
  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.
  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.
  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.
  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).
  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.
  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.
  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 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.
  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.
  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 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.
  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.
  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 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.
  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.
  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.
  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.
  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 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.
  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.
  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.
2004 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 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 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 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.
  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.
  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 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)
  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.