K S Krishnamurthy, K Kandiannan, C K Thankamani, V Srinivasan,. 2011. “Effect of Azospirillum Sp. And Nutrients on Yield of Black Pepper (Piper Nigrum L.)”. Journal of Spices and Aromatic Crops 20 (1):09-13. https://updatepublishing.com/journal/index.php/josac/article/view/4964.