Dr. A. K. Mariappan, Ms. C. Madhumitha, Ms. P. Nishitha, Ms. S. Nivedhitha. “Crop Recommendation System through Soil Analysis Using Classification in Machine Learning”. International Journal of Advanced Science and Technology, Vol. 29, no. 3, Mar. 2020, pp. 12738 -47, http://sersc.org/journals/index.php/IJAST/article/view/30399.