Yield, quality, water productivity and economic assessment of sweet corn under irrigation and nitrogen management in humid tropical climate

Abstract

A field experiment was conducted during three consecutive winter seasons of 2013-14 to 2015-16 in the Indo-Gangetic plains encompassing humid tropical climatic region to study four irrigation regimes (gravity drip at 1.0, 0.8 and 0.6 ETc and surface irrigation) and four nitrogen management (100% RDN, 75% RDN + 25% RDN as vermicompost, 75% RDN + 25% RDN as FYM and 75% RDN + 25% RDN as mustard oilcake) on sweet corn. The results showed that surface irrigation with 75% RDN + 25% RDN as vermicompost was found the best treatment combination for maximum yield and economic realization which being competitive with drip irrigation at 1.0 ETc with 75% RDN + 25% RDN as vermicompost. Relatively higher quality parameters and moderate water productivity were observed with drip irrigation schedule at 1.0 ETc. The findings portray the precise planning and efficient management of available water and nitrogen resources for sweet corn growers.