Influence of micro sprinkler fertigation on nutrient balance and yield of groundnut in Alfisols of eastern dry zone of Karnataka

Abstract

A field experiment was conducted at Zonal Agricultural Research Station, University of Agricultural Sciences, GKVK, Bengaluru to study the influence of micro sprinkler fertigation on Groundnut yield and nutrient balance in Alfisols of Eastern Dry Zone of Karnataka. The study revealed that Micro sprinkler fertigation of WSF at 100 % RDF recorded significantly higher pod yield (2882 kg ha-1) and haulm yield (3443 kg ha-1) over all other treatments except Micro sprinkler fertigation of WSF at 75 % RDF (2632 kg ha-1 and 3237 kg ha-1 of pod yield and haulm yield, respectively). In all the micro sprinkler fertigation treatments, the net gain of fertilizers (N, P and K) was noticed. Higher net gain of soil N was recorded in micro sprinkler fertigation of WSF at 100 % RDF (39.3 kg ha-1). Higher net gain of phosphorus was observed with micro sprinkler fertigation of WSF at 75 % RDF (17.2 kg ha-1) and higher gain of potassium was noticed in micro sprinkler fertigation of 100 % RDF through NF (45.0 kg ha-1). Micro sprinkler fertigation of WSF at 75 % RDF recorded significantly higher yields of groundnut along with 25% saving in fertilizers there by causing less hazard to the environment.