Surendra Singh AT. Phosphorus and Zinc Availability in Alkali Soils as Influenced by Application of Graded Levels of Gypsum. JISSS [Internet]. 2019 Jun. 6 [cited 2026 Jun. 6];67(1). Available from: https://epubs.icar.org.in/index.php/JISSS/article/view/90490