This research was conducted at the Laboratory of Biotechnology 1 and Farmers' Land in Karanganyar village, Poncokusumo, Malang. The materials used this study were white oyster mushroom F1 seeds, 70% alcohol, soybean corn rice, sawdust, rice bran baglog. an experimental design, namely Completely Randomized Design (CRD) with 8 treatment levels B1 = kernels (100%), B2 seeds B3 B4 sawdust B5 (50%) ...