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Long-term Effects of the Continuous Cultivation of a Tropical Ultisol in Southwestern Nigeria

Published online by Cambridge University Press:  03 October 2008

A. Olu Obi
A. Olu Obi
Affiliation:
Department of Soil Science, University of Ife, Ile-Ife, Nigeria
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Summary

Continuous cropping of a tropical Ultisol with or without nitrogen fertilizer increased soil acidification and reduced soil organic matter and productivity. Addition of nitrogen fertilizer failed to increase yields. This was apparently due to the decline in soil pH, an increase in the amount of soluble aluminium, and consequent inefficient utilization of added nutrients. Continuous use of ammonium sulphate as a nitrogen source hastened the development of both surface and subsoil exchange acidity.

Type
Research Article
Information
Experimental Agriculture , Volume 25 , Issue 2 , April 1989 , pp. 207 - 215
Copyright
Copyright © Cambridge University Press 1989

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References

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