A.K. Dwivedi, S. Panwar and R.K. Thakur, A.K.B.D. (2020) “Nitrogen Fractions under Long-Term Fertilizer and Manure Applications in Soybean-Wheat Rotation in a Vertisol”, Journal of the Indian Society of Soil Science, 68(2). Available at: https://epubs.icar.org.in/index.php/JISSS/article/view/106432 (Accessed: 23 October 2025).