Hadi, P., Noviana, R.R., Suwardi and Widodo, A.M. 2026. 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, 2 (May 2026), 77-92. DOI:https://doi.org/10.62159/isej.v7i2.2094.