Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-25T07:02:53.599Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

(1)Ballard, L. A. T. & Petrie, A. H. K.Austr. J. exp. Biol. (1936), 14, 135.CrossRefGoogle Scholar
(2)Gregory, F. G.Rep. Cheshunt Exp. Sta. (1917), 19.Google Scholar
(3)Gregory, F. G.Ann. Bot. (1926), 40, 1.CrossRefGoogle Scholar
(4)West, C., Briggs, G. E. & Kidd, F.New Phytol. (1920), 19, 200.CrossRefGoogle Scholar
(5)Yates, F. & Zacopanay, I.J. agric. Sci. (1935), 25, 545.CrossRefGoogle Scholar