Effect of irrigation interval, level of irrigation water and emitter discharge on moisture distribution in clayey soils

Abstract

The field experiment was performed to study the effect of irrigation interval ,irrigation level and emitter discharge on moisture distribution in clayey soil,which was planted with okra by using drip irrigation system .The study was designed as a factorial experiment within split-plot design using RCBD in three replicates , A(irrigation level)was put in main plots and combination between B(irrigation level)and C(emitter discharge)was put in sub-main plots .The results showed increasing soil moisture content at drip source and decreasing of it with faraway from drip source horizontally and vertically for all treatments at end of irrigation operation .The raise of moisture content increases by lowering of irrigation interval and increasing of irrigation level and emitter discharge. The results showed increasing of moisture content of soil profile for all treatments at end growth season comparatively with flowering stage. The results showed decreasing moisture content for all treatments in soil depth lower root zone at end growth season because decreasing of hydraulic conductivity and infiltration rate of soil profile by progressing growth season