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Effects of Nitrogen, Phosphorus and Potassium on Nodulation in Cowpea

Published online by Cambridge University Press:  03 October 2008

G. P. Tewari
G. P. Tewari
Affiliation:
Faculty of Agriculture, University of Nigeria, Nsukka, E. Nigeria
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Summary

A factorial (3 × 3 × 3) experiment using three levels of nitrogen, phosphate and potassium was conducted to evaluate the effects of these elements on the formation of nodules. Results indicated that increasing levels of nitrogen depressed the formation of both effective and ineffective nodules, but phosphorus and potash did not produce any significant effects. Although the soils of the experimental plots were highly leached and strongly acid in nature, the native strains of rhizobia were able to produce copious amounts of effective nodules on plants growing on plots where no nitrogen was applied. It appeared that the naturally occurring rhizobia strains in these soils are well adapted to their natural environments.

Type
Research Article
Information
Experimental Agriculture , Volume 1 , Issue 4 , October 1965 , pp. 257 - 259
Copyright
Copyright © Cambridge University Press 1965

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References

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