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The estimation of yield in cereal crops by sampling methods

Published online by Cambridge University Press:  27 March 2009

A. R. Clapham
A. R. Clapham
Affiliation:
(Rothamsted Experimental Station, Harpenden.)
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Extract

1. Cereal plots were sampled by three different methods; two systematic, and one involving a random location of sampling units.

2. The disadvantages of the systematic methods as compared with random sampling, emerged clearly.

3. These disadvantages were further emphasised in an analysis of earlier data on sampling methods. For this purpose the methods and. results of certain recent contributions to statistical theory were used.

4. By the use of a random sampling method, the variance due to sampling errors may be made a satisfactorily small fraction of the total variance of cereal plots one-fortieth of an acre in area.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 19 , Issue 2 , April 1929 , pp. 214 - 235
Copyright
Copyright © Cambridge University Press 1929

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References

REFERENCES

(1)Arny, A. C. and Garber, R. J.“Field Technic in Determining Yields of Plots of Grain by the Rod-Row Method.” J. Amer. Soc. Agron. (1919) 11.Google Scholar
(2)Arny, A. C. and Steinmetz, F. H.“Field Technic in Determining Yields of Experimental Plots by the Square Yard Method.” J. Amer. Soc. Agron. (1919) 11.Google Scholar
(3)Engledow, F. L.“A Census of an Acre of Corn.” J. Agri. Sci. (1926) 16.Google Scholar
(4)Fisher, R. A.Statistical Methods for Research Workers. Oliver and Boyd, Edinburgh (1925). 2nd edit. 1928.Google Scholar
(5)Fisher, R. A. and Mackenzie, W. A.“Studies in Crop Variation. II. The Manurial Response of Different Potato Varieties.” J. Agri. Sci. (1923) 13.Google Scholar
(6)Wishart, J.“The Generalised Product Moment Distribution in Samples from a Normal Multivariate Population” Biometrika (1928) 20.Google Scholar