Mankotia, B S. 2007. “Effect of Fertilizer Application With Farmyard Manure and in-Situ Green Manures in Standing Rice (Oryza Sativa)-Wheat (Triticum Aestivum) Cropping System*”. The Indian Journal of Agricultural Sciences 77 (8). https://epubs.icar.org.in/index.php/IJAgS/article/view/10036.