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Effects of Nitrogen, Phosphorus and Potassium on Flowering and Yield of Soybeans in Nigeria

Published online by Cambridge University Press:  03 October 2008

G. P. Tewari
G. P. Tewari
Affiliation:
Department of Plant-Soil Science, University of Nigeria, Nsukka, Eastern Nigeria
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Summary

A NPK factorial experiment was conducted during two successive cropping seasons to study direct and residual effects of various treatments on the flower initiation and yield of soybeans. Plants were slower to reach the maximum flowering stage in the year of fertilizer application than in the following year. During the first year potassium in association with phosphorus delayed the flower forming process, whereas potassium alone hastened flowering in the second year unless associated with a high dosage of nitrogen. All the treatments gave far greater yields in the first season, suggesting that fertilizers should be applied during every cropping season. Nitrogen and phosphorus at 20 pounds of N2 and P2O5, per acre gave the biggest yields, but potassium failed to show any response. The residual responses to potassium and phosphorus during the second year were significant but not to nitrogen.

Type
Research Article
Information
Experimental Agriculture , Volume 1 , Issue 3 , July 1965 , pp. 185 - 188
Copyright
Copyright © Cambridge University Press 1965

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References

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