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The reaction, exchangeable calcium, and “lime requirement” of certain Scottish soils

Published online by Cambridge University Press:  27 March 2009

W. G. Ogg  and
W. T. Dow
W. G. Ogg
Affiliation:
Soils Department, Edinburgh and East of Scotland College of Agriculture.
W. T. Dow
Affiliation:
Soils Department, Edinburgh and East of Scotland College of Agriculture.
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Extract

1. Of a large number of cultivated soils examined, chiefly from the south-east of Scotland, the majority had a pH between 5 and 6·5, a “lime requirement” of 0·05 to 0·25 per cent. CaCO3 and an exchangeable calcium content of 0·1 per cent, to 0·45 per cent. CaO.

2. A general agreement was observed between these three sets of figures although numerous exceptions occurred.

3. The reaction of a district of six square miles was studied in detail and of a single farm in still greater detail.

4. Long unploughed soils were found to have a low pH, a low content of exchangeable calcium and a high “lime requirement.”

5. Woodland, hill and heath soils were characterised in their surface layers by an extremely low pH (below 5 as a rule), a low content of exchangeable calcium (usually less than 0·1 per cent. CaO) and a high “lime requirement.”

Type
Research Article
Information
The Journal of Agricultural Science , Volume 18 , Issue 1 , January 1928 , pp. 131 - 158
Copyright
Copyright © Cambridge University Press 1928

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References

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