YADAV SK, SINGH Y, YADAV MK, BABU S, SINGH K. Effect of organic nitrogen sources on yield, nutrient uptake and soil health under rice (Oryza sativa) based cropping sequence. Indian J Agri Sci. 2013;83(2). Accessed October 26, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/27983