Balai, R. C., Meena, L. R., & Sharma, S. C. (2017). Effect of different levels of nitrogen and phosphorus on cowpea [Vigna unguiculata (L.) Walp] under rainfed conditions of Rajasthan. Journal of Agriculture and Ecology, 3(3), 19-24. https://saaer.org.in/journals/index.php/jae/article/view/27