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Fertilizer Trials with Sprayed and Unsprayed Cotton in Nigeria

Published online by Cambridge University Press:  03 October 2008

J. L. Palmer  and
P. R. Goldsworthy
J. L. Palmer
Affiliation:
Institute for Agricultural Research, Samaru, Nigeria
P. R. Goldsworthy
Affiliation:
Institute for Agricultural Research, Samaru, Nigeria
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Summary

The responses of sprayed and unsprayed cotton to ammonium sulphate and single superphosphate at o, 125, and 250 kg./ha. were tested between 1959 and 1964, in three zones of Nigeria. Seed cotton yields of sprayed trials with both fertilizers at 0 and 250 kg./ha. averaged 534 and 768 kg. ha.−1 respectively with significant and positive linear response components in all zones, but significant negative quadratic responses to phosphate in the north and to nitrogen in the south, with a significant interaction in the south. Seed cotton yields of unsprayed trials with both fertilizers at 0 and 250 kg./ha. averaged 305 and 384 kg./ha. respectively with significant positive linear responses to phosphate in the north, to nitrogen in the south and to both in the east and no interactions.

Type
Research Article
Information
Experimental Agriculture , Volume 7 , Issue 4 , October 1971 , pp. 281 - 287
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

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