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Effects of N, P and K on Yields of Cotton in the Sudan Gezira

Published online by Cambridge University Press:  03 October 2008

H. O. Burhan  and
M. G. Mansi
H. O. Burhan
Affiliation:
Agricultural Research Corporation, Wad Medani, Sudan
M. G. Mansi
Affiliation:
Agricultural Research Corporation, Wad Medani, Sudan
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Summary

Effects of N, P and K on yields of cotton were investigated using data obtained over an 18-year period from a factorial experiment comparing various combinations of the three nutrients. The results clearly indicated a significant and fairly consistent response of cotton to the application of fertilizer nitrogen, but the rate of increase in yield with increased N gradually diminished. The response to P was erratic and to K was negligible. The response to N did not vary with levels of P or K. Whether lack of response to P on the alkaline soils of the Gezira was due to sufficient already available in the soil, or because the added fertilizer was fixed and rendered unavailable to the plant needs further investigation. Lack of response to added K was attributed to the high content of available K already in the Gezira soil.

Type
Research Article
Information
Experimental Agriculture , Volume 6 , Issue 4 , October 1970 , pp. 279 - 286
Copyright
Copyright © Cambridge University Press 1970

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References

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