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Examination of the Staple and Effective Land Equivalent Ratios

Published online by Cambridge University Press:  03 October 2008

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

Two extensions to the Land Equivalent Ratio (LER) concept, the Effective LER and the Staple LER, are evaluated for an intercrop of two species. The use of different standardizing sole-crop yields in the Effective LER equation is emphasized for the formation of different comparisons between intercrop and sole-crop yields. The Staple LER for different standardizing sole-crop yields is introduced. The equivalence of the Staple and Effective LERs under certain conditions is shown and illustrated.

Type
Research Article
Information
Experimental Agriculture , Volume 21 , Issue 4 , October 1985 , pp. 369 - 376
Copyright
Copyright © Cambridge University Press 1985

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References

REFERENCES

Chetty, C. K. R. & Reddy, M. N. (1984a). Analysis of intercrop experiments in dryland agriculture. Experimental Agriculture 20:31–40.Google Scholar
Chetty, C. K. R. & Reddy, M. N. (1984b). Staple land equivalent ratio for assessing yield advantage from intercropping. Experimental Agriculture 20:171–177.Google Scholar
Mead, R. & Riley, Janet (1981). A review of statistical ideas relevant to intercropping research (with Discussion). The Journal of the Royal Statistical Society. Series A 144:462–509.Google Scholar
Mead, R. & Stern, R. D. (1979). Statistical considerations in experiments to investigate intercropping. In Proceedings of the International Workshop on Intercropping. Hyderabad, India: ICRISAT.Google 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