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Analysis of Experiments Involving Line Source Sprinkler Irrigation

Published online by Cambridge University Press:  03 October 2008

D. D. V. Morgan  and
M. K. V. Carr
D. D. V. Morgan
Affiliation:
Silsoe College, Silsoe, Bedford, MK45 4DT, England
M. K. V. Carr
Affiliation:
Silsoe College, Silsoe, Bedford, MK45 4DT, England
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Summary

The line-source sprinkler irrigation system provides a continuously variable water application rate, which depends on distance from the line-source. The system is simple to set up and minimizes the amount of land required for experimental work. As the irrigation treatments are allocated systematically, the assumptions of analysis of variance are not satisfied. It is proposed that the effects of irrigation treatments be assessed using analysis of covariance, with distance from the sprinkler line as covariate, thus adjusting for a linear fertility trend. This method of analysis provides an approximate residual mean square for the fitting of response curves, but could be vulnerable to a quadratic fertility trend.

Type
Research Article
Information
Experimental Agriculture , Volume 24 , Issue 2 , April 1988 , pp. 169 - 176
Copyright
Copyright © Cambridge University Press 1988

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References

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