Datta, S P, B L Meena, and R K Rattan. “Development of a Computer Program for Calculating Metal Ion Activity Using Baker Soil Test”. Journal of the Indian Society of Soil Science 61, no. 1 (July 22, 2013). Accessed July 17, 2026. https://epubs.icar.org.in/index.php/JISSS/article/view/31747.