MANGAL PRASAD. 2001. “ Effect of Nitrogen, Phosphorus and Sulphur Applied to Cotton (Gossypium Hirsutum) and Their Residual Effect on Succeeding Indian Mustard (Brassica Juncea) Crop”. Indian Journal of Agronomy 45 (3): 45_3 . https://doi.org/10.59797/ija.v45i3.3404.