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Synopsis: Annual acre beef gain is related to annual acre forage production. The relationship is quadratic and may be used for estimating differences in annual beef gain per acre among treatments evaluated as to forage production under grazing conditions in the same experiments. The difference-estimating equation is: D = 0.071,18 (X1 – X2) – 0.000,001,732 (X12 – X22), where X1 and X2 are the average annual acre yields in pounds of oven dry forage for the two treatments.
2 Biometrician, (present address, SURDD, ARS, USDA, New Orleans, La.), Associate Agronomist, (present address, Plant Introduction Station, Experiment, Ga.), Associate Agronomist, Associate Agronomist, and Animal Nutritionist, respectively, A.P.I. Agr. Exp. Sta. For planning and execution of the experiments the writers acknowledge the work of substation personnel: K. G. Baker, deceased; W. B. Kelley, deceased; V. L. Brown; C. A. Brogden; and J. G. Starling; and of Main Station project leaders: C. M. Martin, resigned, and J. D. Burns, resigned.
Received for publication July 21, 1957.
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