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The relationship between response to N and P fertilizers and soil N and P

Published online by Cambridge University Press:  27 March 2009

B. R. Singh  and
A. P. Uriyo
B. R. Singh
Affiliation:
Department of Soil Science, University of Dar es Salaam, P.O. Box 643, Morogoro, Tanzania
A. P. Uriyo
Affiliation:
Department of Soil Science, University of Dar es Salaam, P.O. Box 643, Morogoro, Tanzania
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Summary

The magnitude of response to fertilizer-N and fertilizer-P decreased with increasing amounts of total soil-N and available soil-P, respectively. Attempts have been made to group the soils into N- and P-fertility classes based on the magnitude of response to applied fertilizers on soils of different fertility with respect to these two nutrient elements.

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 94 , Issue 1 , February 1980 , pp. 247 - 249
Copyright
Copyright © Cambridge University Press 1980

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References

Bray, R. H. & Kurtz, L. T. (1945). Determination of total, organic and available forms of phosphorus in soils. Soil Science 59, 39–45.CrossRefGoogle Scholar
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Singh, B. R., Uriyo, A. P., Mnkeni, P. N. S. & Msaki, J. J. T. (1977). Evaluation of indices of N and P availability for the soils of Morogoro, Tanzania. Proceedings of the Conference for Classification and Management of Tropical Soils, Kuala Lumpur (Malaysia), 15–2008 1977.Google Scholar
Uriyo, A. P. & Singh, B. R., (1978). Effects of the soil fertility status on the yield and response of a maize oultivar to applied N, P and K in the same agroclimate. Beiträge zur tropischen Landwirtschaft und Veterinärmedizin 16, 397–403.Google Scholar