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This article in AJ

  1. Vol. 54 No. 3, p. 247-250
    Received: July 22, 1961

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Relative Efficiency of Plot Sizes and Numbers of Replications as Indicated by Yields of Orchardgrass Seed in a Uniformity Test1

  1. H. H. Rampton and
  2. Roger G. Petersen2



Increasing replications or increasing plot size permitted detection of smaller differences in yield of orchardgrass seed. Accuracy of yield estimates changed most rapidly with change in replications. Hence, on a given area, most accurate yield estimates would result with plots of minimum size and increased replications. Plot cost:land cost relationships showed that as land cost increased, optimum plot size decreased. Optimum plot size for close-drills was about half that for 3-foot rows.

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