Effect of Micro Sprinkler Fertigation on Yield, Nutrient Uptake, Nutrient Use Efficiency and Economics of Groundnut Sameerkumar D.1, Jayadeva H.M.1, Jagadish2, Chandrakant3, Siddappa2 Department of Agronomy, UAS, GKVK, Bengaluru, Karnataka 1UAS, GKVK, Bengaluru 2Dept. of Agronomy, UAS, GKVK, Bengaluru 3Dept. of Soil Science and Agricultural Chemistry, UAS, GKVK, Bengaluru Online published on 15 December, 2016. Abstract A field investigation on “effect of micro sprinkler fertigation on yield nutrient uptake and economics of groundnut” was carried out in Kharif 2014 at ZARS, University of Agricultural Sciences, Bengaluru in red sandy loam soil. The experiment was laid out in randomized complete block design with nine treatments and three replications. Micro sprinkler fertigation of WSF at 100% RDF recorded significantly higher pod yield (2882 kg ha−1), haulm yield (3443 kg ha−1) and nutrient uptake (113.4, 31.6 and 46.4 kg ha−1 N, P and K, respectively) over all other treatments. However, it was on par with micro sprinkler fertigation with WSF at 75% RDF. Significantly higher nitrogen, phosphorous and potassium use efficiency was registered in micro sprinkler fertigation of WSF at 50% RDF (180.7, 60.2 and 120.5 kg kg−1, respectively) over rest of the treatments. Micro sprinkler fertigation of 100% NF recorded significantly higher B: C ratio (2.82) over all other treatments followed by micro sprinkler fertigationof NF at75% RDF (2.64). Micro sprinkler fertigation of WSF at 75% RDF recorded comparatively with higher yields of groundnut along with 25% saving in fertilizers there by causing less hazard to the environment. Top Keywords Micro Sprinkler, Fertigation, Nutrient Use Efficiency and Nutrient Uptake. Top |