SURENDRA S. TOMAR; MOHD. ABBAS, and K N. NIGAM. “ Effect of Sulphur on Growth and Yield of Opium Poppy (Papaver Somnifemm)”. Indian Journal of Agronomy 38, no. 2 (October 10, 2001): 38_2 . Accessed June 25, 2026. https://pub.isa-india.in/index.php/ija/article/view/3940.