Hadi, Pramono, Riski Rahma Noviana, Suwardi, and Agung Mugi Widodo. “Interactive Effects of Fertilizer Types and Shading Levels on ‎Growth, Yield, and Piperine Content of Piper Retrofractum Under ‎Tropical Agroecosystems”. ISEJ : Indonesian Science Education Journal 7, no. 2 (May 9, 2026): 77-92. Accessed May 26, 2026. https://siducat.org/index.php/isej/article/view/2094.