COMPARATIVE EFFICIENCY OF SPRINKLER IRRIGATION OVER CHECK BASIN IRRIGATION IN GROUNDNUT AT DIFFERENT IRRIGATION SCHEDULES
|K. Suresh1, D. Balaguravaiah2, V. Ramulu3 and CH Sujani Rao2
|Received: 30 January 2013 Accepted: 24 February 2013|
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The field experiments were conducted for consecutive two years to assess the comparative efficiency of sprinkler irrigation over check basin irrigation at different irrigation schedules for groundnut (K-6) during rabi season. Split plot design was adopted for the experiment with two methods of irrigation as main treatments M1 – Sprinkler method and M2 – Check basin irrigation and three irrigation schedules based on IW/CPE ratio at 0.6 (I1), 0.8 (I2) & 1.0 (I3) as sub treatments, replicated thrice. During 2004-05, there was no significant difference in the pod yield obtained between the methods of irrigation, however irrigation scheduled at 1.0 IW/CPE ratio significantly out yielded (1511 kg/ha) the pod yield obtained at 0.8 & 0.6 IW/CPE ratios. The WUE and shelling percent were also not influenced by the irrigation methods and schedules. Significantly higher pod yield was obtained during 2005-06 under sprinkler method of irrigation (2020 kg/ ha) as compared to check basin of irrigation (1762 kg/ha). Irrigation at IW/CPE of 1.0 (I3) resulted in significantly higher pod yield (2123 kg/ha) when compared to I1 and was on par with that of 0.8 IW/CPE ratio (I2). Results indicated that sprinkler method of irrigation scheduled at 1.0 or 0.8 IW/CPE ratios would be beneficial to groundnut crop as compared to check basin method of irrigation.