Impact of FYM and NPK levels on nitrogen, protein content and yield of chickpea in vertisols

Abstract

A field experiment was conducted at Research farm, department of soil science & Agricultural chemistry, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (MP) during Rabi season of 2022-23 and 2023-24. A gradient crop Sudan grass was fertilized with three levels of fertility i.e., (0-0-0), (120-80-60), and (240-160-120) kg ha−1N, P2O5 and K2O respectively After harvest of gradient crop, the main crop of chickpea was sown in different gradient strips with 4 levels of N (0, 10, 20 and 30 kg ha−1), P2O5 (0, 30, 60 and 90 kg ha−1), and K2O (0, 10, 20 and 30 kg ha−1), which were randomized in each strip. The FYM levels (0, 5 and 10 t ha-1) were super imposed across the strips. The experiment was laid out in fractional factorial randomized block design as suggested by Ramamoorty et al. (1967). Results showed the maximum nitrogen content and protein content was observed with 10 t FYM, 20 kg N, 60 kg P2O5 and 30 kg K2O ha−1. However, the maximum grain yield was observed with10 t FYM, 20 kg N, 60 kg P2O5 and 30 kg K2O ha−1. While 30 kg N, 90 kg P2O5 and 30 kg K2O ha−1+ 10 t FYM increased the haulm yield.