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United States Department of Agriculture

Agricultural Research Service

Research Project: BIOGEOCHEMICAL PROCESSES AND SOIL MANAGEMENT IMPACTS ON SOIL EROSION, SOIL/AIR/WATER QUALITY, AND GREENHOUSE GAS EMISSIONS

Location: National Soil Erosion Research Lab

Title: Factors affecting soil cohesion

Authors
item Souza, Flavia -
item Nouwakpo, Sayjro -
item HUANG, CHI HUA

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: May 1, 2012
Publication Date: January 21, 2012
Citation: Souza, F.P., Nouwakpo, S.K., Huang, C. 2012. Factors affecting soil cohesion [abstract]. American Society of Agronomy Annual Meeting Abstracts, October 21-24, 2012, Cincinnati, Ohio. 2012 CD ROM.

Technical Abstract: Soil erodibility is a measure of a soil’s resistance against erosive forces and is affected by both intrinsic (or inherent) soil property and the extrinsic condition at the time erodibility measurement is made. Since soil erodibility is usually calculated from results obtained from erosion experiments, there is a strong influence of the extrinsic condition in the erodibility value. We recently developed a simple fluidized bed system that can measure soil cohesion and showed a good correlation between laboratory measured soil cohesion and field measured critical shear stress, an erodibility parameter for erosion by concentrated flow. In this research, we further apply the fluidized bed technique to quantify the development of soil cohesion from drainage and aging. Preliminary results showed that profile drainage (or wet consolidation) has a greater impact in the development of soil cohesion than aging. The results provide the basis for a soil erodibility adjustment factor to account for the wetting and drying effects.

Last Modified: 7/28/2014
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