Singh, D., and S. Dixit. “Influence of Integrated Nutrient Management on Forms of Soil Acidity, Aluminum and Iron on Turmeric Cultivation in Acid Alfisol”. Journal of Plantation Crops, vol. 41, no. 1, May 2013, pp. 46-50, https://updatepublishing.com/journal/index.php/JPC/article/view/5901.