Madalageri, V Krishnamoorthy, M B. “Effect of Interaction of Nitrogen and Phosphorus on Seed and Essential Oil Yield of Ajowan (Trachyspermum Ammi L.) Genotypes”. Journal of Spices and Aromatic Crops 9, no. 2 (December 24, 2000): 137–139. Accessed December 1, 2025. https://www.updatepublishing.com/journal/index.php/josac/article/view/4562.