The protein degradabilities of lucerne hay, red clover, soybean crude residue, brewer's grain, sorghum silage, Chinese wildrye, smooth brome, reed fescue were 88. 28, 78. 83, 79. 11, 75. 87,74. 26, 59. 37, 82. 16, 84. 90 per cent, respectively, estimated by cellulase-pepsin technique. The regres sion equation of protein degradability between nylon bag (Y) and cellulase-pepsin (X) techniques was Y= -34. 27+1. 29X (r=0. 72, P<0.05). The incubating condition of cellulase-pepsin technique is pepsin (160 IU/0. 3...