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High loss of nitrogen in drainage from soil under grass following a prolonged period of low rainfall

Published online by Cambridge University Press:  27 March 2009

E. A. Garwood  and
K. C. Tyson
E. A. Garwood
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berkshire, SL6 5LR
K. C. Tyson
Affiliation:
The Grassland Research Institute, Hurley, Maidenhead, Berkshire, SL6 5LR
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Extract

When high rates of fertilizer N are applied to grass in an area of low rainfall, considerable amounts may be lost to drainage in the subsequent winter if the N is not fully utilized owing to dry soil conditions during the growing season (Garwood & Tyson, 1973). The data now presented were obtained from the lysimeters described in that paper. The soil is a sandy loam, overlying chalk. The swards of perennial ryegrass (Lolium perenne cv. S. 23) were cut four times each year. Two rates of N were applied as ammonium nitrate (Nitrana), 250 kg (LN) and 500 kg N/ha per year (HN). Two-fifths of this N were applied in March and one-fifth after each of the first three cuts.

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 89 , Issue 3 , December 1977 , pp. 767 - 768
Copyright
Copyright © Cambridge University Press 1977

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References

Garwood, E. A. & Tyson, K. C. (1973). Losses of nitrogen and other plant nutrients to drainage from soil under grass. Journal of Agricultural Science, Cambridge 80, 303–12.CrossRefGoogle Scholar
Lockyer, D. R. & Cowling, D. W. (1977). Non-symbiotic nitrogen fixation in some soils in England and Wales. Journal of the British Grassland Society 32, 7–12.CrossRefGoogle Scholar