University of California

Implications of a uniformity trial with small plots of wheat


G. A. Baker
E. B. Roessler

Authors Affiliations

G. A. Baker was Professor of Mathematics and Statistician in the Experiment Station, Davis; E. B. Roessler was Professor of Mathematics and Statistician in the Experiment Station, Davis.

Publication Information

Hilgardia 27(5):183-188. DOI:10.3733/hilg.v27n05p183. September 1957.

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A field trial with small plots of wheat, which can be regarded as a uniformity trial, is presented. This trial was examined in a manner similar to that used on other field trials, with strikingly contrasting results. Results of randomization trials in other studies have differed markedly from the conventional published analysis-of-variance tests based on the F tables. This trial, however, although judged poor by experienced investigators because of weed infestation, soil variation, and stand variation, seems to correspond very closely in many important respects to the model and to resulting tests given in the textbooks.

Literature Cited

Baker G. A. Uniformity field trials when differences in fertility levels of subplots are not included in experimental error. The Annals of Mathematical Statistics. 1952. 23:289-293. DOI: 10.1214/aoms/1177729448 [CrossRef]

Baker G. A., Baker R. E. Strawberry uniformity yield trials. Biometrics. 1953. 9:412-421. DOI: 10.2307/3001713 [CrossRef]

Baker G. A., Briggs F. N. Yield trials with backcross derived lines of wheat. Annals of the Institute of Statistical Mathematics. 1950. 2:61-67. DOI: 10.1007/BF02919502 [CrossRef]

Baker G. A., Huberty M. R., Veihmeyer F. J. A uniformity trial on unirrigated barley of ten years’ duration. Agronomy Journal. 1952. 44:267-270. DOI: 10.2134/agronj1952.00021962004400050011x [CrossRef]

Riddle O. C., Baker G. A. Biases encountered in large-scale yield tests. Hilgardia. 1944. 16:1-14. DOI: 10.3733/hilg.v16n01p001 [CrossRef]

Tang P. C. The power function of the analysis of variance tests with tables and illustrations of their use. Statistical Research Memoirs. 1938. 2:University of London.

Baker G, Roessler E. 1957. Implications of a uniformity trial with small plots of wheat. Hilgardia 27(5):183-188. DOI:10.3733/hilg.v27n05p183
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