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The significance of crop residues to the maintenance of fertility under continuous cultivation at Samaru, Nigeria

Published online by Cambridge University Press:  27 March 2009

M. J. Jones
M. J. Jones
Affiliation:
Institute for Agricultural Research, Samaru, Nigeria
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Summary

The residues from a continuous millet–maize rotation, grown at two levels of phosphate and two levels of nitrogen fertilization, were either burned and the ash incorporated; chopped and incorporated unburned; or completely removed. After 3 years, differences in soil organic matter were small and largely non-significant, but the ash treatment had minimized the general fall in soil pH, and the ash and the unburned residue treatments had both conserved topsoil exchangeable K and Mg, which, where the residues had been removed, had declined by 44 and 12%, respectively. Fertilizer effects were also significant; single superphosphate had increased exchangeable Ca and lessened the fall in soil pH; calcium ammonium nitrate had depleted exchangeable Mg generally and had lowered pH and exchangeable Ca particularly where unburned residues had been returned.

A balance sheet of soil cations (0–30 cm), drawn up from soil and crop analyses and known fertilizer inputs shows, first, that whereas the calcium added in single superphosphate increased the exchangeable reserves of this nutrient, that added as calcium ammonium nitrate did not and must be presumed lost by leaching; secondly, the decline in exchangeable K where residues were removed was much less than the total crop removal, indicating a probable substantial release from non-exchangeable form.

In the fourth season, treatment-induced soil differences, in particular the ratios between exchangeable cations, significantly affected the chemical composition of the maize test crop but not its final yield.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 86 , Issue 1 , February 1976 , pp. 117 - 125
Copyright
Copyright © Cambridge University Press 1976

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References

REFERENCES

Allison, L. E. (1965). Organic carbon. In Methods of Soil Analysis (ed. Black, C. A. et al. ), pp. 1367–78. Madison, Wisconsin: American Society of AgronomyGoogle Scholar
Black, C. A. (1968). Soil Plant Relationships, 2nd ed.New York: Wiley.Google Scholar
Bolton, J. & Coulter, J. K. (1965). Report of Rothamsted Experimental Station for 1964, p. 62.Google Scholar
Boyer, J. (1972). Soil potassium. In Soils of the Humid Tropics, pp. 102–35. Washington, D.C.: National Academy of Sciences.Google Scholar
Charreau, C. & Nicou, R. (1971). L'amelioration du profil cultural dans les sols sableux et sablo-argileux de la zone tropicale seche ouest-africaine et ses incidences agronomiques. Agronomie Tropicale, Paris 26, 209–55, 565–631, 903–78, 1183–237.Google Scholar
Cooke, G. W. (1967). The Control of Soil Fertility. London: Crosby Lockwood.Google Scholar
D'Hoore, J. L. (1964). Soil Map of Africa, Scale 1 to 5,000,000. Joint project no. 11, Commission for Technical Co-operation in Africa, Lagos.Google Scholar
Jones, M. J. (1971). The maintenance of soil organic matter under continuous cultivation at Samaru, Nigeria. Journal of Agricultural Science, Cambridge 77, 473–82.CrossRefGoogle Scholar
Jones, M. J. & Wild, A. (1975). The Savanna Soils of West Africa; the Maintenance and Improvement of their Fertility. Commonwealth Bureau of Soils Technical Communication. (In the Press.)Google Scholar
Keay, R. W. J. (1959). An Outline of Nigerian Vegetation, 3rd ed.Government Printer, Lagos.Google Scholar
Kowal, J. & Knabe, D. T. (1972). An Agroclimatological Atlas of the Northern States of Nigeria. Zaria, Nigeria: Ahmadu Bello University Press.Google Scholar
Mokwunye, A. U. (1975). Residual effects of superphosphate and rock phosphate fertilizers. Samaru Agricultural Newsletter 17, 25–30. Institute for Agricultural Research, Samaru, Nigeria.Google Scholar
Nye, P. H. & Greenland, D. J. (1960). The Soil Under Shifting Cultivation. Commonwealth Bureau of Soils Technical Communication, no. 51.Google Scholar
Pichot, J., Burdin, S., Charoy, J. & Nabos, J. (1974). L'enfouissement des pailles de mil Pennisetum dans les sols sableux dunaires. Son influence sur les rendements et la nutrition minérale du mil. Son action sur les caractéristiques chimiques du sol et la dynamique de l'azote minéral. Agronomic Tropicale, Paris 29, 995–1005.Google Scholar
Poulain, J. F. (1967). Résultats obtenus avec les engrais et les amendements calciques. Acidification des sols et correction. Colloque sur la fertilité des sols tropicaux, Tananarive 1, 469–89.Google Scholar
Van Raay, J. G. T. & De Leeuw, P. N. (1970). The importance of crop residues as fodder. A resource analysis in Katsina Province, Nigeria. Tijdschrift voor economische en sociale Geographie 61, 137–47.CrossRefGoogle Scholar
Wild, A. (1971). The potassium status of soils in the savanna zone of Nigeria. Experimental Agriculture 7, 257–70.CrossRefGoogle Scholar