SHIVRAN DR, AHLA WAT IPS. Crop productivity, nutrient uptake and soil fertility as influenced by cropping system and fertilizers in pigeonpea (Cajanus cajan)-wheat (Triticum aestivum) cropping system. Indian J Agri Sci. 2013;70(12). Accessed October 27, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/28736