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Related Experiment Video

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Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

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Published on: September 11, 2016

Deformational mass transport and invasive processes in soil evolution.

G H Brimhall, O A Chadwick, C J Lewis

Science (New York, N.Y.)

|February 7, 1992

Summary

Soil vertical differentiation results from chemical, mechanical, and biological processes. Root growth and animal activity mix soil, while pore size and organic acids influence material translocation and accumulation with depth.

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Area of Science:

Soil Science
Geochemistry
Ecology

Background:

Soil properties are vertically differentiated by complex transport processes.
Subsurface stresses, mixing, and mass balance influence soil characteristics with depth.

Purpose of the Study:

To elucidate the coupled chemical, mechanical, and biological processes driving soil vertical differentiation.
To understand how translocation and accumulation influence soil structure and properties at various depths.

Main Methods:

Analysis of soil transport processes including chemical dissolution and mechanical stresses.
Investigation of biological influences such as root growth and animal burrowing.
Examination of mass removal and accumulation dynamics within soil profiles.

Main Results:

Vertical soil differentiation is driven by coupled transport processes.
Root channels and animal burrows facilitate vertical detritus movement.
Pore size and organic acid dissolution influence material accumulation and soil structure transformation.

Conclusions:

Soil formation involves intricate interplay of physical, chemical, and biological factors.
Biological activity and chemical weathering significantly modify soil structure and properties with depth.
Understanding these processes is crucial for soil science and ecosystem studies.