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Effects of Continuous Fertilizer Use on a Ferruginous Soil (Haplustalf) In Nigeria

Published online by Cambridge University Press:  03 October 2008

L. Singh  and
V. Balasubramanian
L. Singh
Affiliation:
Institute for Agricultural Research, Samaru, Zaria, Nigeria
V. Balasubramanian
Affiliation:
Institute for Agricultural Research, Samaru, Zaria, Nigeria
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Summary

In a long-term fertility study it was observed that judicious use of chemical fertilizers maintained the levels of soil pH, total N, organic C, CEC and exchangeable Ca. Highest accumulation of exchangeable Ca and Mg was found in the 40–60 cm layer. Absence of Mg and K from the fertilizer schedule resulted in a decrease in the amounts of those elements in the soil. Profile CEC and exchangeable Ca were not affected much by the application of K or trace elements. Compared with adjacent grass fallow or virgin bush land, only the values of C/N ratio, CEC and exchangeable Mg decreased on cultivation. All the crops responded well to fertility levels but not to K; trace element response was confined to cotton and groundnut.

Type
Research Article
Information
Experimental Agriculture , Volume 15 , Issue 3 , July 1979 , pp. 257 - 265
Copyright
Copyright © Cambridge University Press 1979

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References

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