Variation in actual corn (Zea mays L.) evapotranspiration, single, and dual crop coefficient under different point source irrigation systems in a semiarid region

Close management of irrigation could have considerable impacts on water resources, especially for cropping systems dominated by corn. The experiment was carried out to compare the influence porous capsule (PCI), surface drip (DI), and subsurface (SDI) systems, with or without mulching, actual evapotranspiration (ETc act), crop coefficients (Kc single Kc dual), biomass yield, use efficiency (WUE) corn in a semiarid region Iran. arranged split-plot design three assigned main plots two mulching (with foil type) treatments (M1 M2) sub-plots. ETc act varied significantly (P < 0.05) different being (mm) 389.8 PCI, 377.0 DI, 372.8 SDI. highest average Kcb (0.82 1.22) lowest Ke (0.12) were observed under PCI system. dry wet biological yields (29.98 107 t/ha) + M1 treatment, (23.19 58.54 t/ha, respectively) DI M2 treatment. WUE (7.89 kg/m3) also treatment; produced best IWUE comparison SDI systems. Accordingly, system be viable alternative areas scarce particularly smallholder farmers.