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United States Department of Agriculture

Agricultural Research Service

Title: Roughness and Crop Residue Influences on Soil Acoustic Impedance.

Authors
item Rickman, Ronald
item Sabatier, James - UNIV. OF MS
item Attenborougth, K. - THE OPEN UNIV., UK

Submitted to: Agroacoustics Symposium
Publication Type: Proceedings
Publication Acceptance Date: November 29, 1995
Publication Date: N/A

Interpretive Summary: Soil surface surface roughness and soil porosity measurements are required for comparing various tillage and management practices for their effect on soil erosion. Acoustic techniques can be used to measure both roughness and porosity. If the acoustic measurements can be related to the probability for soil loss, they will provide a rapid, inexpensive method for monitoring soil surface conditions.

Technical Abstract: Level difference acoustical observations above fine and coarse textured sand with flat and furrowed surfaces were compared with theoretical computations. The agreement between observed and matched curves was excellent. Values of parameters: porosity , roughness elements, and source-receiver distances were measured. Tortuosity and flow resistivity were fitted with values appropriate for the conditions of the sand. Small amounts of fresh small grain straw could not be detected.

Last Modified: 11/23/2014
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