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United States Department of Agriculture

Agricultural Research Service

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Research Project: RESEARCH ON WIND EROSION PREDICTION SYSTEM (WEPS) WIND BLOWN CROP RESIDUE TECHNOLOGY DEVELOPMENT

Location: Engineering and Wind Erosion Research Unit

Project Number: 5430-11120-009-27
Project Type: Reimbursable

Start Date: Mar 12, 2012
End Date: Sep 30, 2013

Objective:
The purpose of this agreement is to conduct basic research on three types of crop residue to determine the threshold wind speeds that will cause the residue to leave the field under typical after-harvest surface conditions. The data collected will be analyzed and algorithms developed, which will be incorporated into the WEPS wind erosion model used by NRCS.

Approach:
Major tasks to be completed: a) Complete modifications to the portable wind tunnel for the field and laboratory experiments. b) Instrument portable wind tunnel to obtain desired wind speed threshold data for blowing flat residue. c) Conduct field wind tunnel experiments under laboratory conditions and on after-harvest winter wheat field sites in the Manhattan, KS area. d) Conduct field wind tunnel experiments under laboratory conditions and on after-harvest field sites for at least two additional crop residues (soybeans and corn or grain sorghum) in the Manhattan, KS area. e) Analyze the field data to form functional relationships between surface conditions (amount of anchored standing residue existing) and the threshold wind speeds measured vs. the quantity of stems and leaves (measured separately) that left the experimental sites (wind tunnel test plots). f) Develop the functional relationships between surface conditions and threshold wind velocities vs. lost mass of loose residue stems and leaves considered "blowing residue". g) Incorporate functional relationships into code to be implemented within WEPS. Progress milestones and estimated completion dates: 1) Wheat (moderately tough residue class) a) Initial (exploratory) Laboratory Wind Tunnel Study Jul 1, 2012 b) Field Wind Tunnel Study – July 14, 2012 Aug 1, 2012 c) Extended Laboratory Wind Tunnel Study Sep 1, 2012 2) Soybeans (fragile residue class) a) Initial (exploratory) Laboratory Wind Tunnel Study Oct 1, 2012 b) Field Wind Tunnel Study Nov 1, 2012 c) Extended Laboratory Wind Tunnel Study Jan 1, 2013 3) Corn/Grain Sorghum (tough residue class) a) Initial (exploratory) Laboratory Wind Tunnel Study Oct 1, 2012 b) Field Wind Tunnel Study Nov 1, 2012 c) Extended Laboratory Wind Tunnel Study Jan 1, 2013 4) Data analysis and algorithm development Apr 1, 2013 5) Incorporation of algorithm into WEPS Jun 1, 2013

Last Modified: 4/17/2014
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