Muraleedharan, K. K., D. P. Verma, Ujwala Ranade Malvi, G. M. Nandini, G. J. Kumar, M. S. Shruthi, R. Smitha, and R. Sowmya. 2019. “A Different Approach to Soil Analysis: Indicative Studies”. Journal of Plantation Crops 41 (2):219-26. https://updatepublishing.com/journal/index.php/JPC/article/view/5826.