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Effects of Soil and Management Factors on Fertilizer Responses and Yield of Irrigated Wheat in Iran

Published online by Cambridge University Press:  03 October 2008

T. P. Abraham  and
A. Hoobakht
T. P. Abraham
Affiliation:
Soil Institute, P.O. Box 1555, Tehran, Iran
A. Hoobakht
Affiliation:
Soil Institute, P.O. Box 1555, Tehran, Iran
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Summary

The yield data obtained from fertilizer experiments conducted at 195 locations for three years were examined to study the relations between yield, response to nitrogen and phosphorus, soil test values, and number of irrigations, using multiple regression technique. Irrigation accounted for 20–36 per cent of the yield variation, whereas soil factors did not show appreciable effects. Nitrogen response was influenced by irrigation, while some soil factors affected response to phosphorus.

Type
Research Article
Information
Experimental Agriculture , Volume 8 , Issue 3 , July 1972 , pp. 195 - 202
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

F.A.O./S.F. (1966). Soil Fertility Survey and Establishment of a Soil Fertility Unit. Rome: F.A.O./S.F.: 20/I.R.A.Google Scholar
Williams, E.J. (1959). Regression Analysis. New York: John Wiley.Google Scholar