INTERCROPPING CORN WITH SOME SOYBEAN VARIETIES UNDER LOW IRRIGATION WATER LEVELS

Abstract

A three-year study was carried out at Giza Agricultural Experiments and Research Station, Faculty of Agriculture, Cairo University, Giza, Egypt during three successive summer seasons (2018, 2019 and 2020) to evaluate the effect of low irrigation water levels on the productivity of corn and soybean varieties under different solid and intercropping systems. The factors of this study included three levels of applied irrigation water (3000, 2400 and 1800 m3/fad were expressed as 100 "WL0", 80 "WL1" and 60%"WL2", respectively), cropping systems (alternating ridges 2:2 "Int1", mixed "Int2" ,as well as, solid plantings of corn "ridges Sc1 and beds Sc2" and soybean "ridges Ss1 and beds Ss2") and four soybean varieties Giza 21, Giza 22, Giza 35 and Giza