“Supplying Liquid Organic Fertilizer (POC) With Organic Waste Materials On The Growth And Product of Lettuce (Lactuca Sativa L.) ”. Agricultural Science 4, no. 2 (July 6, 2021): 104–112. Accessed March 19, 2025. http://agriculturalscience.unmerbaya.ac.id/index.php/agriscience/article/view/53.