Agricultural and Biosystems Engineering Publications

Document Type

Book Chapter

Publication Date

4-13-2004

Journal or Book Title

Water Quality Assessments in the Mississippi Delta

Volume

ACS Symposium Series, Vol. 877

First Page

235

Last Page

248

DOI

10.1021/bk-2004-0877.ch017

Abstract

Herbicides are transported through subsurface drainage to surface waters from corn-growing areas of the USA and Canada. Herbicide losses are highly variable, ranging between 0.01 to 10 g/ha. The magnitude of herbicide loss results from precipitation patterns, herbicide-soil interactions, and farming practices. This report reviews existing literature and presents new research concerning effects of farming practices on herbicide losses in drainage water. Conservation tillage practices which increase infiltration tend to increase herbicide losses. Increasing intensity of drainage and increased frequency and rate of herbicide use also increase herbicide losses. Banding lowers the application rate and reduces annual losses and average concentrations of atrazine compared to broadcast applications. Metolachlor losses were reduced by banding, but the effect was only statistically significant in continuous corn systems.

Comments

This book chapter is from ACS Symposium Series 877 (2004): 235–248, doi:10.1021/bk-2004-0877.ch017.

Access

Open

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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