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Effects of Rate and Time of Nitrogen Application on Yields of Cotton in Northern Nigeria

Published online by Cambridge University Press:  03 October 2008

J. B. Smithson  and
R. G. Heathcote
J. B. Smithson
Affiliation:
Institute for Agricultural Research, Ahmadu Bello University, Samaru, Zaria, Nigeria
R. G. Heathcote
Affiliation:
Institute for Agricultural Research, Ahmadu Bello University, Samaru, Zaria, Nigeria
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Summary

Trials to determine the optimal rate and time of nitrogen application to cotton were conducted at three sites for three seasons. The results indicate that nitrogen is used most efficiently when applied at relatively low rates, with at least half the application delayed until flowering. Early application leads to the incorporation of a greater proportion of the nitrogen into the vegetative structures which, at lower rates, may leave insufficient for fruit development. With late application a greater proportion of the nitrogen is utilized in reproductive growth, although full utilization may not be achieved at higher rates.

Type
Research Article
Information
Experimental Agriculture , Volume 13 , Issue 1 , January 1977 , pp. 1 - 8
Copyright
Copyright © Cambridge University Press 1977

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References

REFERENCES

Brown, K. J. (1961). Prog. Rep. Exp. Sta. Tanganyika Territory Lake Province, 1959–1960, 6. Cott. Res. Corp.Google Scholar
Brown, K. J. (1962), Prog. Rep. Exp. Sta. Tanganyika Territory Lake Province, 1960–1961, 6. Cott. Res. Corp.Google Scholar
Burhan, H. O. (1972). Cotton Grow. Rev. 49, 216.Google Scholar
Faulkner, R. C., Smithson, J. B. & Heathcote, R. G. (1975). Prog. Rep. Exp. Sta. Northern States, Nigeria 1973–1974. Cott. Res. Corp.Google Scholar
Federer, W. T. (1955). Experimental Design. New York: Macmillan.Google Scholar
Heathcote, R. G. & Smithson, J. B. (1974). Expl Agric. 10, 199.CrossRefGoogle Scholar
Jones, E., Tollervey, F. E., Thorp, T. K. & Lakhani, D. (1973). Prog. Rep. Exp. Sta. Uganda, 1971–1972, 53. Cott. Res. Corp.Google Scholar
Jones, M. J. (1973). Expl Agric. 9, 113.CrossRefGoogle Scholar
Jones, M. J. (1974). Samaru Agric. Newsletter 16, 67.Google Scholar
King, H. E. & Lawes, D. A. (1958). Prog. Rep. Exp. Sta. Northern Nigeria, 1956–1957, 6. Cott. Res. Corp.Google Scholar
Le Mare, P. H. (1967). Prog. Rep. Exp. Sta. Tanzania Western Cotton Growing Area, 1965–1966, 34. Cott. Res. Corp.Google Scholar
Munro, J. M. & Farbrother, H. G. (1969). Cotton Grow. Rev. 46, 261.Google Scholar
Musa, M. M. (1968). Plant & Soil. 28, 413.CrossRefGoogle Scholar
Musa, M. M. (1969). A. Rep. Gezira Agric. Res. Stat., Sudan.Google Scholar
Palmer, J. L. & Goldsworthy, P. R. (1971). Expl Agric. 7, 281.CrossRefGoogle Scholar
Peat, J. E. & Brown, K. J. (1962). Emp.J. expl Agric. 30, 215.Google Scholar
Tollervey, F. E. (1972). Cotton Grow. Rev. 49, 149.Google Scholar