SHINDE, A K; BIRARI, S P; JADHAV, B B. Effect of potassium nitrate and urea on growth and yield of cowpea (Vigna unguiculata). The Indian Journal of Agricultural Sciences, Delhi, India, v. 64, n. 7, 2013. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/29326. Acesso em: 23 oct. 2025.