P. Kalita and T. Nair, “Variability in root characters in wheat (Triticum aestivum) genotypes under varying levels of nitrogen*”, Indian J Agri Sci, vol. 75, no. 11, Nov. 2005, Accessed: Oct. 27, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/9275