Verma, H.P., P.K. Chovatia, Seema Sharma, and A.C. Shivran. “Growth and Yield of Cowpea As Influenced by Nitrogen and Phosphorus Levels on Medium Black Soils of Gujarat”. Annals of Agricultural Research 36, no. 4 (February 25, 2016). Accessed June 27, 2026. https://epubs.icar.org.in/index.php/AAR/article/view/55624.