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Open Access Green as soon as Postprint is submitted to ZB.
Ecologically Important Differences between Equilibrium and Percolation Soil Extracts, Bavaria.
Geoderma 43, 213-227 (1988)
The chemical composition of saturation extracts (equilibrium soil solutions) from bulk samples (sieved and mixed) were compared with that of solutions obtained by percolating water through undisturbed cores of A horizons of five profiles and of B and C horizons of one profile in northeastern Bavaria. Solutions obtained by percolation contained larger amounts of protons and acidic cations (H+, Al3+, Fe2+) and smaller amounts of base cations (Ca2+, Mg2+, K+, Na+) than the saturation extracts. Differences were large enough to be statistically significant. These differences are attributed to distinctions in surfaces exposed to the extracting solutions, in exchange processes and in fluxes of elements out of aggregates. Because it works with undisturbed soil samples the percolation method is proposed as more realistic for identification of the chemical composition of soil solutions than the saturation extracts. The information thus obtained should provide better indications of conditions affecting root growth, nutrient uptake and seepage composition in soil horizons.
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Publication type
Article: Journal article
Document type
Scientific Article
ISSN (print) / ISBN
0016-7061
e-ISSN
1872-6259
Journal
Geoderma
Quellenangaben
Volume: 43,
Issue: 2-3,
Pages: 213-227
Publisher
Elsevier
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Biochemical Plant Pathology (BIOP)