M. Prabhavathi, R.N. Adhikari, A. Raizada, et al. Identification of Soil Fertility Constraints using GIS for Sustainable Crop Production in the Watershed of Semi-arid Tropics. JISSS. 2023;71(2):159-171. Accessed October 26, 2025. https://epubs.icar.org.in/index.php/JISSS/article/view/140789