IN VITRO DIGESTIBILITY ANALYSIS OF FERMENTED RICE STRAW USING ASPERGILLUS NIGER AND EFFECTIVE MICROORGANISMS Muhammad Darmawansya, Natsir Sandiah, Firman Nasiu Indonesian Journal Of Animal Agricultural Science (IJAAS) Vol. 3 No. 1 2021 DOI 10.33772/ijaas.v3i1.16258