Singh, R D, A K Sikka, Shivani Shivani, and K Rajan. “Effect of Irrigation and Nitrogen on Yield, Water Use Eficiency and Nutrient Balance in Rice (Oryza Sativa)- Based Cropping System”. The Indian Journal of Agricultural Sciences 78, no. 1 (January 5, 2008). Accessed October 27, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/9760.