University of California

Stability of variety response to extensive variations of environment and field plot design


B. J. Hoyle
G. A. Baker

Authors Affiliations

B. J. Hoyle was Specialist in Field Station Administration and Superintendent of the Tulelake Field Station, Tulelake; G. A. Baker was Professor of Mathematics and Statistician in the Experiment Station, Davis.

Publication Information

Hilgardia 30(13):365-394. DOI:10.3733/hilg.v30n13p365. January 1961.

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The ideal conditions upon which the usefulness of the classical field trials depend rarely exist in nature. Nor can the conditions that actually exist be sufficiently formalized by current conventional practices to provide an adequate and consistently reliable interpretation of field trials. AI large number of trials for the same strains of Hannchen barley and other crops show that field trials can be freed from the procedures which attempt, by preselection and mathematical compensations, to arrange naturally irregular conditions according to a formalized mathematical model. Simpler and more accurate procedures, based on conditions as they actually exist, can be substituted. Thus the costs and time necessary for definitive field trials can be greatly reduced. Agricultural testing programs can be accelerated, with increased confidence in the reliability of the results.

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Hoyle B, Baker G. 1961. Stability of variety response to extensive variations of environment and field plot design. Hilgardia 30(13):365-394. DOI:10.3733/hilg.v30n13p365
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