Premium
DISTRIBUTION OF PYROPHOSPHATE‐EXTRACTABLE IRON AND ORGANIC CARBON IN SOILS OF VARIOUS GROUPS
Author(s) -
BASCOMB C. L.
Publication year - 1968
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1968.tb01538.x
Subject(s) - podzol , gleysol , soil water , eluvium , chemistry , horizon , humus , pyrophosphate , soil horizon , total organic carbon , organic matter , mineralogy , inorganic chemistry , environmental chemistry , geology , soil science , mathematics , organic chemistry , enzyme , geometry
Summary Potassium pyrophosphate (0.1 m ) removes very little Fe from crystalline Fe oxides at pH 10, but peptizes finely divided hydrous amorphous oxides and organic matter in soils. Fe and C contents of extracts from each horizon of twenty‐six British soil profiles show distinctive patterns, independent of the residual dithionite‐soluble Fe. Thus extracts of humus Fe podzols have maximum Fe and C in the B horizon, peaty gley podzol has maximum Fe in the B horizon but maximum C in the surface. These groups are differentiated from non‐podzols which have maximum pyrophosphate extractable Fe and C in the surface horizon, decreasing with depth. Intermediate patterns help to quantify differences in soils of classes having properties of more than one soil group.