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The Development of the Soil Profile in North Wales as Illustrated by the Character of the Clay Fraction

Published online by Cambridge University Press:  27 March 2009

G. W. Robinson
G. W. Robinson
Affiliation:
(University College of North Wales, Bangor.)
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Extract

1. The changes in composition of the clay fraction in different horizons of some typical North Welsh profiles have been studied.

2. The changes in the molecular ratio of silica to sesquioxides (SiO2/Al2O3 + Fe2O3) throughout a soil profile afford an indication of the nature of the eluviation which has affected the mineral portion of the soil.

3. The data for North Welsh soils indicate a general tendency to enrichment of the lower layers in sesquioxides, particularly ferric oxide, at the expense of the surface layers.

4. The silica-sesquioxide ratio of the clay fraction is an important aid to series definition.

5. The soils of North Wales, particularly in the uplands, have probably been subjected to considerable erosion in the past. The profiles are therefore considered to be more or less truncated.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 20 , Issue 4 , October 1930 , pp. 618 - 639
Copyright
Copyright © Cambridge University Press 1930

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References

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