A. K. SINGH, M. K. MEENA, R. C. BHARATI, and R. M. GADE, “Effect of sulphur and zinc management on yield, nutrient uptake, changes in soil fertility and economics in rice (Oryza sativa)–lentil (Lens culinaris) cropping system”, Indian J Agri Sci, vol. 83, no. 3, Mar. 2013, doi: 10.56093/ijas.v83i3.28357.