S. RAJKUMARA, S. S. GUNDLUR, and A. B. KHOT, “Effect of continuous application of organics to supply nitrogen and phosphorus on maize (Zea mays) and chickpea (Cicer arietinum) under irrigated condition”, Indian J Agri Sci, vol. 82, no. 10, pp. 892–5, Oct. 2012, doi: 10.56093/ijas.v82i10.24187.