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Agronomy Journal Abstract -

Relative Precision of Different Experimental Designs and Number of Replications in Pea Yield Trials1


This article in AJ

  1. Vol. 62 No. 1, p. 61-64
    Received: June 15, 1969

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  1. Thomas A. Zuhlke and
  2. Earl T. Gritton2



The relative efficiency of simple, triple, and balanced lattice designs relative to randomized complete blocks for fresh-shelled pea yield trials was estimated from uniformity trial data. Lattices were always equal to or more efficient than randomized complete blocks, ranging from 100% with some short wide plots in the smaller block sizes to 236% for a long narrow plot with a block size of seven.

The minimum detectable true difference as a percent of the experiment mean is given for several treatment, replicate, and plot size and shape combinations. The importance of minimizing experimental variability is demonstrated.

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