Khalid, Rizwan, Khalid Saifullah Khan, Ghulam Shabbir, Muhammad Yousaf, and Shahid Yaqub Naz. “Status of Plant Available Sulphur and Its Relationship to Other Soil Characteristics in Pothwar Soils: Plant Available Sulphur in Soil”. Biological Sciences - PJSIR 52, no. 2 (April 27, 2009): 84–90. Accessed November 24, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/521.