Deficit Irrigation Effect on Wheat Grain Yield and Water Productivity at Gota Irrigation Scheme in Beza Koyisa Kebele Gena-Bosa District, Dewuro Zone, South West Ethiopia Region
Abstract
Markos Habtewold Adebo
This study aimed at effect of deficit irrigation on the yield of wheat and water productivity on Gota irrigation scheme in Gena district Dewuro Zone South Western Region of Ethiopia. Two level of treatments; 85%ETc, and farmers practice replicated in six times which laid out in Randomized Complete Block Design (RCBD). The maximum total grain yield (35.69Qt/ha) obtained from treatments of 85%ETc and minimum grain yield (30.61Qt/ha) was obtained from farmers practice. There was 5.08Qt/ha difference scored between the two levels of water application methods. As an ANOVA indicates that; the maximum water productivity value (1.06kg/m3) was recorded from treatment level of 85%ETc than farmers practice (0.85kg/m3). Economically, net income of 132,393ETB/ha was obtained from deficit irrigation and 102,901.4 ETB/ha obtained from farmers’ practices. Benefit cost ratio (B: C) obtained were 2.83 at 85%ETc and 2.03 at farmers’ practices which the project is expected to deliver a positive net present value to a firm and its investors. Therefore, demonstration of deficit irrigation technology is highly recommended, and scaled up especially in water shortage areas without reducing optimum grain yield and water Productivity