Effect of different levels of phosphorus and sulphur on yield and quality of green gram (Vigna radiata L) under teak (Tectona grandis L)-based agroforestry system

Application of phosphorus and elemental sulphur is an important tool to obtain high yield of green gram (Vigna radiata L) under teak-based agroforestry system in Kharif season. The overall goal of the present experiment was to assess the impact of phosphorus and elemental sulphur application on green gram yield under teak-based agroforestry system in eastern Uttar Pradesh. Green gram was grown in an alley cropping system which integrated trees with grain crop. Application of phosphorus at 65 kg/ha gave the best results in terms of green gram yield attributes like pod length, number of pods per plant, number of grains per pod, test weight, grain yield, haulm yield, biological yield, harvest index and protein content in grain and haulm, protein yield in grain and haulm and total protein yield as compared to the phosphorus at 45 and 25 kg/ha under both conditions of open and teak-based agroforestry system. Application of sulphur (50 kg/ha) also gave higher yield like pod length, number of pods per plant, number of grains per pod, test weight, grain yield, haulm yield, biological yield, harvest index and protein content in grain and haulm, protein yield by grain and haulm and total protein yield as compared to sulphur applied @ 35 and 20 kg/ha in open and teak-based agroforestry system.