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Studies in Sampling Technique: Cereal Experiments. III. Results and Discussion.

Published online by Cambridge University Press:  27 March 2009

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

1. Four cereal experiments, comprising 210 plots each about l/40th acre in area, were harvested by a sampling method. Three of the experiments were later harvested by large-scale methods, so that a direct comparison could be made.

2. The field technique is described, and an account is given of the small combined thresher and winnower which was constructed for the purpose of dealing rapidly with the numerous small sheaflets.

3. The results are analysed in detail and it is shown that the samplingerrors per plot lie between 5 and 6 per cent. of the mean yield, and that these errors are sufficiently low for there to be little loss of information.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 21 , Issue 2 , April 1931 , pp. 376 - 390
Copyright
Copyright © Cambridge University Press 1931

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References

REFERENCES

(1)Clapham, A. R.The estimation of yield in cereal crops by sampling methods. J. Agric. Sci. (1929), 19, 214–35.CrossRefGoogle Scholar
(2)Wishart, J. and Clapham, A. R.A study in sampling technique: The effect of artificial fertilisers on the yield of potatoes. J. Agric. Sci. (1929), 19, 600–18.CrossRefGoogle Scholar
(3)Fisher, R. A.Statistical Methods for Research Workers (1930), 3rd ed. Edinburgh, Oliver and Boyd.Google Scholar
(4)Roemer, T.Der Feldversuch (1925), 2nd ed. Berlin, Deutsche Landwirtschafts-Gesellschaft.Google Scholar
(5)Tippett, L. H. C.Tracts for Computers: No. XV. Random Sampling Numbers (1927), London, Cambridge University Press.Google Scholar