Shahzad, Armghan, Imdad Ali Mahmood, Muhammad Salim, Arshad Ali, Badr-uz- Zaman, and Adil Mir. 2010. “Effect of Calcium on Nitrogen Utilization by Rice in Saline Soils: Calcium Effect on Nitrogen Utilization by Rice”. Biological Sciences - PJSIR 53 (3):164-68. https://v2.pjsir.org/index.php/biological-sciences/article/view/445.