Boonpradub, S. (1986) “Effect of Weed Competition on Growth and Yield of Blackgram (Vigna mungo L.) ”, Thai Agricultural Research Journal, 4(2), pp. 128–133. available at: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/245179 (accessed: 2 October 2026).