Evaluation of crop irrigation requirement of French bean (Phaseolus vulgaris L.) under varying meteorological conditions in Imphal West district of Manipur, northeast India

Abstract

The purpose of this study was to evaluate the crop irrigation requirement of French bean (Phaseolus vulgaris L.) under varying meteorological conditions in the Imphal West district of Manipur, northeast India. The total reference evapotranspiration (ETo ) during ‘Normal’, ‘Dry’ and ‘Wet’ Years are estimated at 289, 300 and 285 mm, respectively. The crop coefficient (Kc ) of French bean values ranges from 0.50 to 1.09 during ‘Normal’ Year, while Kc values ranges from 0.50 to 1.05 during ‘Dry’ Year and Kc values vary from 0.05 to 1.08 during 'Wet' Year. The effective rainfall is calculated at 164.3, 106.2 and 311.4 mm during ‘Normal’, ‘Dry’ and ‘Wet’ Years, respectively. The crop irrigation requirement (CIR) of French bean is estimated at 134.4 mm during ‘Normal’ Year; on the contrary, CIR of French bean during ‘Dry’ Year is calculated at 161.8 mm and 88.7 mm during ‘Wet’ Year, respectively. Thus this study will helped for successful water management for sustainable crop production.