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Weather and the Yield of a Crop

Published online by Cambridge University Press:  03 October 2008

M. A. V. Devanathan
M. A. V. Devanathan
Affiliation:
Tea Research Institute of Sri Lanka, St Coombs, Talawakele, Sri Lanka (Ceylon)
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Summary

The growth of plants is controlled by the availability of photosynthesized carbohydrates. Since both rainfall and sunshine are needed for photosynthesis an empirical expression is proposed which relates vegetative growth to the product of rainfall and bright sunshine hours over a specified period. Tea is a crop in which the yield is entirely vegetative and harvested throughout the year. Laycock's data for tea yields from constant treatment plots in Malawi show that yield was strongly correlated with the product of rainfall per month (R) and average daily hours of sunshine per month (S) for the previous month (r=0·972). The graph of yield vs RS for the previous month gives a straight line passing through the origin. This empirical weather parameter RS appears suitable for the study of vegetative harvests.

Type
Research Article
Information
Experimental Agriculture , Volume 11 , Issue 3 , July 1975 , pp. 183 - 186
Copyright
Copyright © Cambridge University Press 1975

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References

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