Response of Summer Groundnut to Plant Spacing Fertilizer Land Configuration and Sprinkler Irrigation Levels

Abstract

newlineTwo field experiments were conducted during summer 2017 and 2018 to study newlinethe response of summer groundnut to plant spacing, fertilizer, land configuration and newlinesprinkler irrigation levels at the Main Agricultural Research Station, University of newlineAgricultural Sciences, Dharwad. In experiment-I plant spacing (S1: 30 cm × 10 cm, newlineS2: 30 cm × 7.5 cm and S3: 30 cm × 5 cm) and fertilizer levels (F1: 100 % RDF, newlineF2: 125 % RDF and F3: 150 % RDF) were studied as main plot and sub plot respectively newlineand laid out in split plot design with three replications. In experiment-II land newlineconfiguration (L1: Broad bed and furrow, L2: Ridges and furrow and L3: Flat bed) and newlinesprinkler irrigation levels (I1: fixed depth (3.1 cm), I2: 1.0 ETc, I3: 0.8 ETc and newlineI4: 0.6 ETc) were studied as horizontal and vertical factor respectively and laid out in newlinestrip plot design with three replications. newlinePlant spacing of 30 cm × 10 cm with application of 125 per cent RDF newline(31.25:93.75:31.25 kg N:P2O5:K2O ha-1) recorded significantly higher total dry matter newlineproduction, pod yield (39.96 q ha-1), kernel yield (26.71 q ha-1) and net returns newline(and#1048576; 1,06,588 ha-1) as compared to other combinations. However, it was on par with newline30 cm × 10 cm with 150 per cent RDF. The lowest kernel yield (22.87 q ha-1) and newlinenet returns (and#1048576; 84,720 ha-1) were observed in plant spacing of 30 cm × 5 cm with newline100 per cent RDF. newlineIn case of land configurations and sprinkler irrigation levels, broad bed and newlinefurrow method of land configurations with sprinkler irrigation at 1.0 ETc recorded newlinehigher growth, pod yield (38.82 q ha-1) and net returns (and#1048576; 1,00,320 ha-1) as compared to newlineother combinations. However, it was on par with broad bed and furrow with sprinkler newlineirrigation at fixed depth (3.1 cm). The total water requirement of summer groundnut newlineranged from 478.33 to 503.05 ha-mm with sprinkler irrigation at 1.0 ETc with water newlineproductivity (0.74 kg m-3). newlineSummer groundnut performed well at 30 cm × 10 cm with 125 per cent RDF. newlineBesides, farmers may fallow broad bed and furrow method with sp