DAS, ANUP, et al. “Effect of Organic and Inorganic Sources of Nutrients on Yield, Nutrient Uptake and Soil Fertility of Maize (Zea mays)—mustard (Brassica Campestris) Cropping System*”. The Indian Journal of Agricultural Sciences, vol. 80, no. 1, Jan. 2011, https://epubs.icar.org.in/index.php/IJAgS/article/view/2828.