Singh MK, Pashupalak S, Pal SK, Thakur R, Verma UN. Effect of fertilizer and plant-density management on productivity and economics of maize (Zea mays) + blackgram (Phaseolus mungo) intercropping. Indian J Agri Sci. 2012;65(11). Accessed October 29, 2025. https://epubs.icar.org.in/index.php/IJAgS/article/view/19111