Sankaran, K Baskar, K. “Effect of Humic Acid (potassium Humate) on Growth and Yield of Turmeric (Curcuma Longa L.) in an Alfisol”. Journal of Spices and Aromatic Crops 14, no. 1 (June 26, 2005): 34–38. Accessed October 5, 2025. https://www.updatepublishing.com/journal/index.php/josac/article/view/4816.