Impacts of tillage and application methods on atrazine and alachlor losses from upland fields: Research paper

Watanabe, Hirozumi, Watermeier, Nathan L., Steichen, James M., Barnes, Phillip, & Phong, Thai K. (2007) Impacts of tillage and application methods on atrazine and alachlor losses from upland fields: Research paper. Weed Biology and Management, 7(1), pp. 44-54.

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The effects of tillage practises and the methods of chemical application on atrazine and alachlor losses through run-off were evaluated for five treatments: conservation (untilled) and surface (US), disk and surface, plow and surface, disk and preplant-incorporated, and plow and preplant-incorporated treatments. A rainfall simulator was used to create 63.5 mm h-1 of rainfall for 60 min and 127 mm h-1 for 15 min. Rainfall simulation occurred 24-36 h after chemical application. There was no significant difference in the run-off volume among the treatments but the untilled treatment significantly reduced erosion loss. The untilled treatments had the highest herbicide concentration and the disk treatments were higher than the plow treatments. The surface treatments showed a higher concentration than the incorporated treatments. The concentration of herbicides in the water decreased with time. Among the experimental sites, the one with sandy loam soil produced the greatest losses, both in terms of the run-off volume and herbicide loss. The US treatments had the highest loss and the herbicide incorporation treatments had smaller losses through run-off as the residue cover was effective in preventing herbicide losses. Incorporation might be a favorable method of herbicide application to reduce the herbicide losses by run-off.

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ID Code: 89017
Item Type: Journal Article
Refereed: Yes
Additional Information: TY - JOUR Export Date: 2 March 2010 Source: Scopus
Keywords: Erosion, Herbicide, Residue, Run-off
DOI: 10.1111/j.1445-6664.2006.00238.x
ISSN: 1445-6664
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 14 Oct 2015 01:14
Last Modified: 23 Oct 2015 01:11

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