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This article in AJ

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


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doi:10.2134/agronj1970.00021962006200010020x

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

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

Abstract

Abstract

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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