Mutmainah, Siti. 2020. “Changes In Sub Optimal Soil Nutrient Status By Adding Liquid Organic Fertilizer From Tofu Wastewater And Lemongrass: Perubahan Status Hara Tanah Lahan Sub Optimal Dengan Penambahan Pupuk Organik Cair (Poc) Air Limbah Tahu Dan Serai Wangi”. Agrifarm: Jurnal Ilmu Pertanian 9 (1):14-20. https://doi.org/10.24903/ajip.v9i1.906.