A field experiment was conducted over two successive seasons of 2017 and 2018 in Egypt. The aim was to study the effect of irrigation systems (surface and subsurface drip irrigation) and irrigation amounts (100%, 80%, and 60% of crop evapotranspiration, ETc) on the yield of bean crop (Phaseolus vulgaris) and evaluate the SALTMED model performance on simulation of soil moisture, total dry matter, and yield. Despite the highest yield values being achieved with the 100% of ETc treatment, there were no significant differences between the 100% and 80%. This means a water saving of 20% can be achieved without significantly compromising the yield. Yield and water productivity under subsurface irrigation was slightly higher than under surface drip irrigation. This is because under subsurface drip irrigation, there is no wetted surface area contributing to evaporation losses as is the case for surface drip. In addition, the soil moisture under subsurface drip is kept within the root zone for the longest possible time without subjecting the crop to water stress. The SALTMED model accurately simulated soil moisture, total dry matter, yield, and water productivity. Hence, the model could be applied as crop, water, and land management tool under current and future Egyptian climatic conditions.
Rationalizing irrigation water and maximizing water use efficiency became the priority of irrigation planners and users under Egyptian conditions. Therefore, the aim of this study was to evaluate adjusted of self-compensating gated pipe for modified surface irrigation and to evaluate the pepper yield response and water use efficiency under three irrigation system (drip irrigation ,traditional gated pipe and modified gated pipe) and three water treatments (100, 75 and 50% of ETC) in old land conditions of Egypt. Hereby field experiments were carried out at the Experimental Farm of Faculty of Agriculture, Ain Shams University, Kalubia Governorate, which represents alluvial soils, for two successive growing seasons 2006 and 2007. Results revealed that. In laboratory experiments of self-compensating gated pipe out let average discharge from 29 L/min were obtained at pressure range of (2-9 kPa) with coefficients of variation less than 0.9%. Uniform discharge was obtained at modified gated pipe under pressure range of 45-90 cm. Corresponding field data were similar to laboratory data. Regular uniform water flow from gates and regular uniform pressure head from each outlet was obtained along line at modified gated pipe under constant pressure. Regular advance times approximately was obtained in modified gated pipe along furrows (0
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.