S. K. Chaudhary, P. Rao, and P. K. Jha, “Productivity and nutrient uptake of rice (Oryza sativa) varieties as affected by nitrogen levels under rainfed lowland ecosystem*”, Indian J Agri Sci, vol. 78, no. 5, May 2008, Accessed: Oct. 27, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/9798