K. K. MANN, B. S. BRAR, and N. S. DHILLON, “Influence of long-term use of farmyard manure and inorganic fertilizers on nutrient availabiIity in a Typic Ustochrept”, Indian J Agri Sci, vol. 76, no. 8, Jan. 2011, Accessed: Oct. 25, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/3036