Fig. 5. Effect of manure and moisture level (g H₂O g^–1 dry feedlot soil mixture [FSM]) on microbial substrate content of the FSM. The standard errors of the least squares mean (n = 3) for crude protein ([CP], organic N x 6.25), starch, and nonstarch polysaccharide (NSP) are 2.2, 3.1, and 42.9, respectively.