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Evaluation of sulphur-coated urea fertilizers in savannah soils: 2. Effects on soil pH and residual nitrogen

Published online by Cambridge University Press:  27 March 2009

L. A. Nnadi  and
S. M. Abed
L. A. Nnadi
Affiliation:
Institude for Agricultural Research, Zaria, Nigerin
S. M. Abed
Affiliation:
Institude for Agricultural Research, Zaria, Nigerin
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Summary

The residual effects of sulphur-coated urea (SCU) fertilizers were evaluated by measuring the pH and mineral-N in the soil profile after 2 years of application of these fertilizers to soils in the various ecological zones of the savannah of Nigeria. Changes of 0·2–0·3 pH units relative to the control (without applied N) were detected on the sandier soils at Kadawa and Mokwa but not on the heavier Samaru soils. There was little or no difference among the sulphur-coated urea and calcium ammonium nitrate in their acidification effects. Also residual nitrogen levels were low in plots that received SCU but did not differ significantly from those of calcium ammonium nitrate.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 101 , Issue 1 , August 1983 , pp. 125 - 129
Copyright
Copyright © Cambridge University Press 1983

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References

Bache, B. W. & Heathcote, R. G. (1969). Long-term effects of fertilizers and manure on soil and leaves of cotton in Nigeria. Experimental Agriculture 5, 241–247.CrossRefGoogle Scholar
Bremner, J. M. (1965). Inorganic forms of nitrogen. In Methods of Soil Analysis (ed. Black, C. A.), pp. 1179–1232. Madison, Wisconsin.Google Scholar
Greenland, D. J. (1962). Denitrification in some tropical soils. Journal of Agricultural Science, Cambridge 58, 227–233.CrossRefGoogle Scholar
Jones, M. J. (1975). Leaching of nitrate under maize at Samaru. Tropical Agriculture (Trinidad) 52, 1–10.Google Scholar
Jones, M. J. (1976 a). Effect of three nitrogen fertilizers and lime on pH and exchangeable cation content at different depths in cropped soils at two sites in the Nigerian savanna. Tropical Agriculture (Trinidad) 53, 243–254.Google Scholar
Jones, M. J. (1976 b). Water movement and nitrate leaching in a Nigerian savanna soil. Experimental Agriculture 12, 69–79.CrossRefGoogle Scholar
Jones, M. J. & Wild, A. (1975). Soils of the West African savanna. Technical Communications No. 55. Commonwealth Bureau of Soils, Harpenden.Google Scholar
Nnadi, L. A. (1975). Comparison of leaching losses of nitrogen from soluble and slow-release fertilizers. Samaru Agricultural Newsletter 17, 82–85.Google Scholar
Nnadi, L. A. & Abed, S. M. (1983). Evaluation of sulphur-coated urea fertilizers in savannah soils. 1. Response of cotton and sorghum. Journal of Agricultural Science, Cambridge 101, 119–123.CrossRefGoogle Scholar
Nnadi, L. A. & Stockinger, K. R. (1980). Leaching losses of N from lysimeter plots at Samaru, Nigeria. Proceedings of the 1st International Soil Science Congress, Accra, Ghana.Google Scholar
Roberts, S. A., Richards, A. W. & Weaver, W. H. (1977). Soil nitrate, mineralizable nitrogen and nitrate in sugarbeet petioles as guides to nitrogen fertilization. Washington State University College of Agricultural Research Centre Bulletin 845.Google Scholar
Ward, R. C. (1971). Nitrate-nitrogen soil test – Approaches to use and interpretation. Soil Science and Plant Analysis 2, 61–71Google Scholar