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On the effect of sunshine on wheat yield at Rothamsted

Published online by Cambridge University Press:  27 March 2009

L. H. C. Tippett
L. H. C. Tippett
Affiliation:
(Statistical Department, Rothamsted Experimental Station, Harpenden.)
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Extract

The method used in this paper to reduce sunshine data is that developed by Fisher(1). It consists, briefly, in fitting to the distribution for each year, a curve

where T0, T1T2, etc., are orthogonal polynomial functions of zero, first, second, etc., order in time. The constants s0, s1, s2, … etc., are found by least squares, and are correlated with similar rainfall constants (r0, r1, r2 etc.) and with the crop.

The regression of the wheat yield on rainfall has already been found (1), so a method has been devised, whereby those results can be used in order to find the partial regression of wheat yield on the sunshine sequence, eliminating all rainfall effect.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 16 , Issue 2 , April 1926 , pp. 159 - 165
Copyright
Copyright © Cambridge University Press 1926

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References

REFERENCE

(1)Fisher, R. A. (1924). “The Influence of Rainfall on the Yield of Wheat at Rothamsted.” Phil. Trans., B, 213, 89–142.Google Scholar