Surekha, K, and K. Pavan Chandra Reddy. “Contribution of Crop Residues to Yield and Nutrient Uptake of Irrigated Rice ( Oryza Sativa) in Rice-Rice Cropping System”. The Indian Journal of Agricultural Sciences, vol. 75, no. 7, July 2005, https://epubs.icar.org.in/index.php/IJAgS/article/view/9080.