SINGHE, P WEERA, et al. “Influence of Combined Application of Farmyard Manure and Udaipur Rock Phosphate on Availability and Transformation of Phosphorus in Typic Ustochrept under Rice (Oryza Sativa) – Wheat (Triticum Aestivum) Sequence*”. The Indian Journal of Agricultural Sciences, vol. 78, no. 10, Jan. 2011, https://epubs.icar.org.in/index.php/IJAgS/article/view/2722.