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A General form of the ‘Land Equivalent Ratio’

Published online by Cambridge University Press:  03 October 2008

Janet Riley
Janet Riley
Affiliation:
Statistics Department, Rothamsted Experimental Station, Harpenden, Hertfordshire, AL5 2JQ, England
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Summary

The Land Equivalent Ratio (LER) concept is presented and interpreted. Several different intercropping systems are considered and the need for methods to evaluate them is discussed. A general form of the LER is proposed for the evaluation, in particular, of a system that combines two intercrops having different yield proportions. Appropriate LER curves, obtained by varying the yield proportions, are used to compare different intercropping systems, and the importance of this approach is discussed.

Type
Research Article
Information
Experimental Agriculture , Volume 20 , Issue 1 , January 1984 , pp. 19 - 29
Copyright
Copyright © Cambridge University Press 1984

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References

REFERENCES

Mead, R. & Riley, J. (1981). A review of statistical ideas relevant to intercropping research. Journal of the Royal Statistical Society Series A (General) 144:462–509.CrossRefGoogle Scholar
Mead, R. & Willey, R. W. (1980). The concept of a ‘Land equivalent ratio’ and advantages in yields from intercropping. Experimental Agriculture 16:217–228.CrossRefGoogle Scholar
Willey, R. W. & Osiru, D. S. O. (1972). Studies on mixtures of maize and beans (Phaseolus vulgaris) with particular reference to plant population. Journal of Agricultural Science, Cambridge 79:519–529.Google Scholar