Correlation matrix of proximate, fiber, non-fiber carbohydrates and in vitro dry matter digestibility on pH 5.4 and 4.0. Om, Organic matter; CP, crude protein; EE, ether extract; NDF, neutral detergent fiber; ADF, acid detergent fiber; NFC, non-fiber carbohydrate; Hemi, hemicellulose; IVDMD, in vitro dry matter digestibility.