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Time of Application of Nitrogen Fertilizer to Maize at Samaru, Nigeria

Published online by Cambridge University Press:  03 October 2008

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

Maize was grown for three years at three levels of nitrogen, 56, 112 and 224 kg. N ha.−1, involving altogether nine different timing and splitting treatments. Measurements were made of grain yield, plant nitrogen status and total-N-uptake, and, in one year, movement of nitrate-N in control plot soils. Where only 56 kg. N ha.−1 was applied, its time of application made very little difference to yield; at higher rates of nitrogen an unsplit application as late as seven weeks was very inefficient, but only at the highest rate did a split application give any appreciable yield increase over an unsplit application to the seed bed. Consideration of the soil nitrate-N data and the long-term pattern of rainfall distribution leads to the conclusion that leaching is unlikely to be a serious problem in the nitrogen nutrition of early-planted maize.

Type
Research Article
Information
Experimental Agriculture , Volume 9 , Issue 2 , April 1973 , pp. 113 - 120
Copyright
Copyright © Cambridge University Press 1973

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References

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