This study aims to increase the in vitro ruminal degradability of oil palm fronds (OPFs) through enzymatic pretreatment. The isolated fungi were selected based on their lignocellulosic degrading enzyme activities. Eleven successfully isolated, and activities evaluated. Three fungi, F1, F2 F4 selected, they identified as Trichoderma harzianum MK027305, MK027306 Fusarium solani MK027309, respecti...