Siregar, Rizky, and Kurniawan Sinaga. 2026. “The Effect of Fermentation Duration on the NPK Content and C/N Ratio in Chicken Manure Using M21”. Jurnal Multidisiplin Dehasen (MUDE) 5 (3), 1375-82. https://doi.org/10.37676/mude.v5i3.11391.