SINGH, V K, B S DWIVED, and ARVIND K SHUKLA. 2011. “Yields, and Nitrogen and Phosphorus Use Efficiency As Influenced by Fertilizer NP Additions in Wheat (Triticum Aestivum) under Rice (Oryza Sativa)-Wheat and Pigeonpea (Cajanus Cajan)-Wheat System on a Typic Ustochrept Soil”. The Indian Journal of Agricultural Sciences 76 (2). https://epubs.icar.org.in/index.php/IJAgS/article/view/2485.