Sadanandan, S. H. A. K. (2005) “Effect of source and method of application of zinc on yield and quality of black pepper (Piper nigrum L.)”, Journal of Spices and Aromatic Crops, 14(2), pp. 117–121. Available at: https://www.updatepublishing.com/journal/index.php/josac/article/view/4826 (Accessed: 5 October 2025).