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Loss of mineral nitrogen from soil

Published online by Cambridge University Press:  27 March 2009

K. Shaw
K. Shaw
Affiliation:
National Agricultural Advisory Service, Newcastle upon Tyne
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Extract

1. The pattern of downward movement of nitrate in light soil is different from that in heavy clay soil of the kind used in this work.

2. In light sandy soils, where vertical structural fissures are absent, nitrate becomes distributed down the profile on leaching.

3. In heavy soils, which are well fissured and possess a gleyed horizon of partially decomposed plant debris at cultivation depth, most of the nitrate disappears from the profile after removal, by leaching or denitrification, from the cultivation layer.

4. There is little difference in the amount of rain required to remove nitrate from the surface layers of light or heavy soil.

5. Heavy and continuous rain is required to remove nitrate completely from either light or heavy soils.

6. Nitrification of ammonium sulphate is more rapid in summer than winter, but nitrification does proceed slowly during winter.

7. Ammonium nitrogen is not leached from the surface layer of either light or heavy soil.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 58 , Issue 2 , April 1962 , pp. 145 - 152
Copyright
Copyright © Cambridge University Press 1962

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References

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