D. KUMAR, S. SINGH, J. SINGH, and S. P. SINGH, “Influence of organic and inorganic fertilizers on soil fertility and productivity of wheat (Triticum aestivum)”, Indian J Agri Sci, vol. 85, no. 2, pp. 177–181, Feb. 2015, doi: 10.56093/ijas.v85i2.46483.