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The estimation of leaf area in field crops

Published online by Cambridge University Press:  27 March 2009

D. J. Watson
D. J. Watson
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts
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Extract

1. It is shown that the leaf area: leaf weight ratio decreases with increasing leaf weight.

2. The relation between the leaf area: leaf weight ratio and leaf weight is well fitted by a linear regression equation.

3. A method of estimating the mean leaf area per leaf or per plant of a field crop by means of this regression is described. The mean weight per leaf is determined by a large sampling, and the leaf area: leaf weight ratio and its regression on leaf weight are estimated on a small subsidiary sample.

4. Alternative methods of estimation from the mean leaf weight and either the unweighted or the weighted mean leaf area: leaf weight ratio are shown to give positively biased estimates of mean leaf area.

5. It is emphasized that the small sample, from which the leaf area: leaf weight ratio and its regression on leaf weight are determined, must be a strictly random selection from the whole population.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 27 , Issue 3 , July 1937 , pp. 474 - 483
Copyright
Copyright © Cambridge University Press 1937

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References

REFERENCES

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