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This article in AJ

  1. Vol. 48 No. 10, p. 440-444
     
    Received: Feb 13, 1956


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doi:10.2134/agronj1956.00021962004800100002x

The Distribution of Excreta by Freely Grazing Cattle and Its Effect on Pasture Fertility: I. Excretal Distribution1

  1. R. G. Petersen,
  2. H. L. Lucas and
  3. W. W. Woodhouse2

Synopsis

Synopsis

The negative binomial distribution function is used to characterize quantitatively the time-space distribution of excreta from freely-grazing animals over long periods of time; the Poisson distribution function was found to be reasonably accurate over short periods. Proportion of pasture covered by 0, 1, 2, . . . excretions during a grazing period appears to depend primarily on mean excretal density at the end of the period, and to be practically independent of the size and shape of the pasture.

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