Hariyappa, N., M. V. D’Souza, J. Nagaraj, M. A. Kumar, and J. . “Status of Available Major and Micronutrients in the Coffee Soils of Chikmagalur District in Karnataka”. Journal of Plantation Crops, vol. 37, no. 3, Oct. 2009, pp. 232-4, https://updatepublishing.com/journal/index.php/JPC/article/view/5979.