Maitra, D.N. (2008) “Effect of phosphorous and farmyard manure applied to sunnhemp (Crotalaria juncea) on yield and nutrient uptake of sunnhemp- wheat (Triticum aestivum) cropping system and fertility status in Typic Ustocrept of Uttar Pradesh”, The Indian Journal of Agricultural Sciences, 78(1). Available at: https://epubs.icar.org.in/index.php/IJAgS/article/view/9771 (Accessed: 27 October 2025).