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Published online 1 January 1970
Published in Agron J 62:61-64 (1970)
© 1970 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Relative Precision of Different Experimental Designs and Number of Replications in Pea Yield Trials1

Thomas A. Zuhlke and 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.

Key Words: Pisum sativum L.

1 Published with approval of the Director of the Research Division, College of Agricultural and Life Sciences, of the University of Wisconsin, Madison 53706. Part of a thesis submitted by the senior author in partial fulfillment of requirements for the M.S. degree.

2 Former research assistant in Agronomy and Assistant Professor of Agronomy, Wisconsin Agr. Exp. Sta.

Received for publication June 15, 1969.




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