SINGH, A K, M K MEENA, R C BHARATI, and R M GADE. 2013. “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”. The Indian Journal of Agricultural Sciences 83 (3). https://epubs.icar.org.in/index.php/IJAgS/article/view/28357.