Windblown dust affected by tillage intensity during summer fallow

Sharratt, Brenton, Wendling, Laura and Feng, Guanglong (2010) Windblown dust affected by tillage intensity during summer fallow. Aeolian Research, 2 2-3: 129-134. doi:10.1016/j.aeolia.2010.03.003


Author Sharratt, Brenton
Wendling, Laura
Feng, Guanglong
Title Windblown dust affected by tillage intensity during summer fallow
Journal name Aeolian Research   Check publisher's open access policy
ISSN 1875-9637
2212-1684
Publication date 2010-11-01
Sub-type Article (original research)
DOI 10.1016/j.aeolia.2010.03.003
Volume 2
Issue 2-3
Start page 129
End page 134
Total pages 6
Place of publication London, United Kingdom
Publisher Elsevier
Language eng
Abstract Winter wheat-summer fallow is the conventional crop rotation used on more than 1.5 million ha of agricultural land in the low precipitation zone of the Columbia Plateau in the Pacific Northwest United States. This land is very susceptible to wind erosion during summer fallow because multiple tillage operations during fallow degrade and expose the soil to high winds. We examined possible alternatives to conventional tillage for reducing the emission of windblown PM10 (particulate matter ≤10 μm in aerodynamic diameter) during summer fallow. Soil was subject to seven (conventional), five (reduced), three (delayed-minimum), and zero (no) tillage operations between harvest in July 2004 and sowing in August 2005. Sediment catch and PM10 concentration and wind speed profiles were measured after each tillage operation and sowing under simulated high winds (using a portable wind tunnel) to estimate horizontal sediment and PM10 flux. Horizontal sediment and PM10 flux generally decreased with a decrease in number or intensity of tillage operations. No tillage resulted in the lowest sediment and PM10 flux after most tillage operations; no tillage, however, is not yet an economically viable management option for the region. Sediment and PM10 flux were typically lower for reduced and delayed-minimum tillage than for conventional tillage. Our study suggests that PM10 flux can be reduced from agricultural soils during the summer fallow phase of a wheat-fallow rotation by using reduced or delayed-minimum tillage practices. The reduction in PM10 flux from soils will improve air quality during high winds in the region.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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Created: Sat, 01 Feb 2014, 03:34:56 EST by Laura Wendling on behalf of School of Agriculture and Food Sciences