Some Relationships between Chemical Composition, Nutritive Value, and Intake of Forages Grazed by Steers and Wethers

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Abstract
The data reported in this paper represent a continuation and summary of experiments previously reported by Forbes and Garrigus (I948).Since the earlier publication, several papers bearing on this general subject have come to our attention. The literature on methods of measuring pastureforage intake have been thoroughly reviewed by SaltonstaU (I948). Extensive experiments have been reported by Homb (1946) on the relationship between roughage composition and its digestibility by lambs. Axelsson (I949) has summarized the relationships between composition of feeds and their digestibility, obtaining his data from Schneider's compilation (I946). Lancaster (i949) has proposed that fecal excretion of nitrogen be used as a tool for measurement of pasture-forage intake. The use of forage protein content as an indicator of digestibility has been investigated by Forbes (I950). Reid (1949) has reported the use of naturally occurring chromogenin a manner analogous to the lignin-ratio method for measuring digestibility and intake of forages. This method shows promise of being extremely useful.
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