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Sulphur in Northern Nigerian Soils: 1. The effects of cultivation and fertilizers on total S and sulphate patterns in soil profiles

Published online by Cambridge University Press:  27 March 2009

A. R. Bromfield
Affiliation:
Institute for Agricultural Research, Samaru, P. M. B. 1044, Zaria, Nigeria

Summary

Organic-S and sulphate-S were measured in the Northern Guinea savannah zone down soil profiles under undisturbed natural vegetation, and in land cleared and cropped, with and without fertilizers and farmyard manure. The main soil type was a drained, red to red-brown, sandy clay to clay loam (pH 4·1–5·6 in 0·01 M-Cal2), which strongly sorbed sulphate.

Organic-S was most in the surface layers and decreased with depth. Root remains from the natural fallow vegetation, present up to 9 years after clearance, strongly influenced the distribution of organic-S. The roots disappeared after 19 years, when distribution of organic-S mainly reflected crop-root distribution; amounts of organic-S were related to crop yields. FYM was less effective in maintaining organic-S than fertilizers containing P and N.

Profiles under natural vegetation contained little sulphate-S but it accumulated in the sub-soil after clearance when S was not removed. The sulphate pattern of profiles under unfertilized crops resembled that under natural vegetation. All fertilized sites had a well-defined sulphate sorbtion pattern, the deepest maximum was at 50 cm on a plot where more than 800 kg S/ha had been applied in nineteen annual aounts. Sulphate-S ranged from > 1 ppm, in the deepest samples, to 52 ppm at the absorption maximum.

Almost all the sulphur applied was in the profiles or removed in harvested crops, showing that losses from erosion and leaching were small.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Archer, E. E. (1956). The determination of small amounts of sulphate by reduction to hydrogen sulphide and titration with mercuric or cadmium salts with dithizone as indicator. Analyst, 81, 181–2.Google Scholar
Bache, B. W. & Heathcote, R. G. (1969). Long-term effects of fertilisers and manure on soil and leaves of cotton in Nigeria. Expl Agric. 5, 241–7.CrossRefGoogle Scholar
Barrow, N. J. (1967). Studies on extraction and on availability to plants of adsorbed plus soluble sulphate. Soil Sci. 104, 242–9.CrossRefGoogle Scholar
Bolle-Jones, E. W. (1964). Incidence of sulphur deficiency in Africa. A review. Emp. J. exp. Agric. 32, 241–8.Google Scholar
Bouchy, C. (1968). Contribution à l'etude des déficiencies minérales en culture cotonniere de Côte d'lvoire. Coton Fibr. trop. 23, 423–36.Google Scholar
Braud, M. (1969). Sulphur fertilisation of cotton in tropical Africa. Sulphur Inst. J. 5, no. 4, 35; quoting ‘Braud M et al. (1968), Rapports d'Agronomic de la Station de Bambari de 1956' à 1968’. I. R. C. T. unpublished.Google Scholar
D'Hoore, J. (1964). Soil map of Africa at a scale of 1/5, 000, 000 (revised definitions). Sols afr. 9, 3973.Google Scholar
Freney, J. R. (1961). Some observations on the nature of organic sulphur compounds in soil. Aust. J. agric. Res. 12, 424–32.CrossRefGoogle Scholar
Greenwood, M. (1951). Fertiliser trials with groundnuts in Northern Nigeria. Emp. J. exp. Agric. 19, 225–41.Google Scholar
Goldsworthy, P. R. & Heathcote, R. G. (1963). Fertiliser trials with groundnuts in Northern Nigeria. Emp. J. exp. Agric. 31, 351–66.Google Scholar
Kamprath, E. J., Nelson, W. L. & Fitts, J. W. (1956). The effect of pH, sulphate and phosphate concentrations on adsorption of sulphate by soils. Proc. Soil Sci. Soc. Am. 20, 463–6.Google Scholar
Kowal, J. (1970). The hydrology of a small catchment Basin of Samaru. Part IV. Assessment of soil erosion under varied land management and vegetation cover. Niger. Agric. J. 5. (In the Press.)Google Scholar
Kowal, J. (1972). Study of soil surface crusts in the loess plain soils of Northern Nigeria. Niger. Agric. J. 7. (In the Press.)Google Scholar
Nye, P. H. (1951). Studies on the fertility of Gold Coast soils. Part II. The nitrogen status of the soils. Emp. J. exp. Agric. 19, 275–82.Google Scholar
Stephens, D. (1960). Three rotation experiments with grass fallows and fertilisers. Emp. J. exp. Agric. 28, 165–78.Google Scholar
Whitehead, D. C. (1964). Soil and plant nutrition aspects of the sulphur cycle. Soils Fertil. 27, 17.Google Scholar