B.G. SHIVAKUMAR, and I.P.S. AHLAWAT. “Integrated Nutrient Management in Soybean (Glycine max)wheat (Triticum Aestivum) Cropping System”. Indian Journal of Agronomy, vol. 53, no. 4, Oct. 2001, pp. 273-8, https://doi.org/10.59797/ija.v53i4.4872.