Singh, M.K. (2012) “Effect of fertilizer and plant-density management on productivity and economics of maize (Zea mays) + blackgram (Phaseolus mungo) intercropping”, The Indian Journal of Agricultural Sciences, 65(11). Available at: https://epubs.icar.org.in/index.php/IJAgS/article/view/19111 (Accessed: 29 October 2025).