R. Sagar, G.N. Thippeshappa, K.T. Gurumurhty, Ganapathi, M. Dinesh Kumar, and M.S. Nandish. “Multianalytical Approach to Study Humic Substance Extracted from Farmyard Manure”. Journal of the Indian Society of Soil Science 71, no. 4 (March 3, 2024): 383–387. Accessed June 5, 2026. https://epubs.icar.org.in/index.php/JISSS/article/view/149143.