PRABHAKAR, S. (2013) “Effect of phosphorus, manganese and growth regulator (NAA) on yield and uptake of nutrients by cowpea (Vigna unguiculata)”, The Indian Journal of Agricultural Sciences, 83(6). Available at: https://epubs.icar.org.in/index.php/IJAgS/article/view/30362 (Accessed: 26 October 2025).