The objectives of this study was to evaluate digestibility as in vitro of Oil Kumpai Grass Fermented with EM-4. This study was held on two stage. First ,fermentation of oil kumpai grass with EM-4. Second analysis digestibility as in vitro of oil kumpai grass fermented in a1 Animal Feed and Nutrition Laboratory Agriculture Faculty of UNSRI. Completely randomized designed with 4 treatment and 3 r…