RAVINDRA SINGH, and S.K. AGARWAL. “Effect of Organic Manuring and Nitrogen Fertilization on Productivity, Nutrient-Use Efficiency and Economics of Wheat (Triticum Aestivum)”. Indian Journal of Agronomy, vol. 49, no. 1, Oct. 2001, pp. 49-52, https://doi.org/10.59797/ija.v49i1.5155.