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Delayed nitrification and controlled recovery of aqueous ammonia injected under grass

Published online by Cambridge University Press:  27 March 2009

J. Ashworth  and
R. C. Flint
J. Ashworth
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
R. C. Flint
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
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Summary

Nitrification of aqueous ammonia, and its uptake by grass, are slower when the amount of NH3-N injected per unit length of slit is increased and as a result crop yield is spread more evenly over the growing season. Measurements of the amounts of NH4-, NO3- and NO2-N in the soil, made at intervals from February until October, and computed diagrams showing their distribution in soil under grass, are presented. We conclude that, at average current rates of application, most of the aqueous ammonia used for grass in England and Wales is probably not applied along the injection slit in sufficient quantity to allow it to persist throughout the summer.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 83 , Issue 2 , October 1974 , pp. 327 - 333
Copyright
Copyright © Cambridge University Press 1974

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References

REFERENCES

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Ministry of Agriculture, Fisheries and Food (1972). Types of Fertilizer used on Farm Crops in England and Wales. Soil Analysis and Fertiliser Committee report, no. SAF/5.Google Scholar
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