Energy and protein syncronization in the rumen will affect the rumen fermentation productivity. The purpose of this research was to study the effect of Napier Grass (Pennisetum purpureum) and Indogofera Sp proportion to Crude Protein, Crude Fiber, Neutral Detergent Fiber and Acid Detergent Fiber digestibility In Vitro. This research was held from February to march 2017 at Experimental Farm and …