International Journal of Environment and Climate Change

The research was conducted at the Regional Agricultural Research Station, Palem during yasangi (rabi) 2020-21 to assess the impact of irrigation regimes on yield, water productivity, and economics of groundnut varieties. The experiment was laid out in a split plot design and comprising of three irrigation levels viz., irrigation at IW/CPE ratios of 1.0 (I₁), 0.8 (I₂), and 0.6 (I₃), as main treatments and four groundnut varieties viz., K-6, GJG-32, KDG-128 and K-9 as sub treatments and replicated thrice. The soil was sandy clay loam having P^H 7.3, available N, P, and K of 195, 35.8, and 87.36 kg ha^-1, respectively. The highest pod yield of 2278 kg ha^-1 and lowest pod yield of 1842 kg ha^-1 could be obtained at the IW/CPE of 1.0 and 0.6 respectively requiring 677.7 ha.mm/ha and 450.7 ha.mm/ha of irrigation water respectively. There was no significant difference in gross returns, net returns, and B: C ratios recorded with irrigation at 1.0 IW/CPE ratio (Rs 126989 ha^-1, Rs 47607 ha^-1, and 1.60, respectively) and 0.8 IW/CPE and significantly lower with 0.6 IW/CPE ratio (Rs.102673 ha^-1, Rs. 28311 ha^-1 and 1.38, respectively). It can be concluded that K-6 or K-9 varieties can be grown during yasangi (rabi) with IW/CPE ratio of 0.8 or IW/CPE ratio of 1.0 as per irrigation water availability for higher water productivity and net returns.