Susi, N., Surtinah, S., & Rizal, M. (2018). Pengujian Kandungan Unsur Hara Pupuk Organik Cair (POC) Limbah Kulit Nenas. Jurnal Ilmiah Pertanian, 14(2), 46-51. https://doi.org/10.31849/jip.v14i2.261