Effect of irrigation on consumptive use, water use efficiency and crop coefficient of sesame (SESAMUM INDICUM L.)

Abstract

Sesame was grown for two successive seasons (2001/2002 - 2002/2003) at Shambat, Sudan. The aim of the study was 
to investigate five irrigation water quantities on actual evapotranspiration as compared with estimated 
evapotranspiration using Penman-Monteith method, modified Penman formula and pan evaporation. Water use 
efficiency and crop factors were calculated and the best water use efficiency was obtained under irrigation water 650 
mm. Under all irrigation treatments, there was a large deviation of pan evaporation, modified Penman and Penman
monteith estimate from actually measured evapotranspiration. Crop coefficients were decreased with decreased water 
quantities in all treatments. Crop coefficients computed by pan evaporation were under all circumstances, lower than 
these obtained by modified Penman and Penman- Monteiths methods.