Crop Evapotranspiration, Irrigation Water Requirement and Irrigation Scheduling of Soybeans under Sprinkler Irrigation system at Nasho Sector, Rwanda

The study aimed to estimate the Crop Water Requirement of Soybean plant under sprinkler irrigation system at Nasho Sector, Rwanda. Experimentally, covered total area 30mx60m give 1800m2. It means that each plot contained 10m width versus 60m height with one installed movable sprinkler. While for water collection from nozzles, catch cans were used collect discharge rate. After pumping sprinklers, research should pass 15min and record rate in experimental 3 sub plots make 3plots*3 cans* 3sub 27 samples whole site. Cropwat 8 computer packages was compute Reference evapotranspiration, scheduling soybeans production. findings showed mean ETo soybean found be 4.79 mm/day. For crop requirement, it rain fall 785.2mm while effective 678.8mm period twelve months. scheduling, evapotranspiration 678.4mm/dec rainfall need per production 134.9 mm/dec Irrigation requirement 547mm/dec. is concluded amount stored root zone less than needed soy beans can suffer deficit. also higher months these implies as results Maximum potential yield most irrigated crops has increased substantially during system. In addition, there an economic gains productivity are attributed improved management, modern practices associated better agronomic management those past. recommended different riser heights may studied observe their effect on measures performance, cater cultivation other crops.