Response of groundnut to phosphorus and bio-organics in Alfisols of Red and Laterite zone of India

Abstract

Present study was carried out for three consecutive kharif season of 2018, 2019 and 2020 to evaluate the performance of different levels of chemical phosphatic fertilizers and FYM in combination with PSB inoculant on groundnut growth, yield, quality and nutrient uptake in an acidic Red and Laterite soil. Application of higher dose of phosphatic fertilizer along with PSB inoculant yielded better results with respect to groundnut plant height, nodulation, pegs and pods plant−1, weight of mature pods plant−1, kernel and haulm yield, protein and oil content, and nutrient uptake. Treatment combination T7 (60 kg ha−1 of P2O5 + PSB inoculant) was observed as the best treatment combination for deriving maximum growth, yield and nutrients uptake of kharif groundnut crop. Treatment T6 (application of 40 kg ha−1 of P2O5 + PSB inoculant) reported similar results. However, maximum profit ($862), benefit cost ratio (2.7) and net return per unit cost of input was significantly higher in T7 compared to T6. Thus, we recommend application of 60 kg ha−1 of P2O5 with PSB inoculant (T7) for the light textured acid soils of Red and Laterite zone of India for higher production and profitability.