Forage is the main feed for ruminant, such as cattle, buffalo, goat, and sheep. Forage grows on dry land, limited dry land is a factor in the lack of forage production as feed animal. Are bolong is one of the many forages found in swamps and can be used as feed animal. The aimed of this research to studied the digestibility value of are bolong fermented by bioboost and EM-4 in vitro. This resea…