Reducing atrazine losses: water quality implications of alternative runoff control practices.

Published

Journal Article

Water quality is being affected by herbicides, some allegedly harmful to human health. Under scrutiny is atrazine (1-chloro-3-ethylamino-5-isopropylamino-2,4,6-triazine), a commonly used herbicide in corn (Zea mays L.) and sorghum [Sorghum bicolor (L.) Moench] production. Concentrations of soluble and adsorbed atrazine losses sometimes exceed the safe drinking water standard of 3 microg L(-1) established by the USEPA. This study assesses the protective implications of runoff control structures and alternative crop farming practices to minimize atrazine losses. Using a computerized simulation model, APEX, the following four practices were the most effective with respect to the average atrazine loss as a percent of the amount applied: (i) constructing sediment ponds, 0.09%; (ii) establishing grass filter strips, 0.14%; (iii) banding a 25% rate of atrazine, 0.40%; and (iv) constructing wetlands, 0.45%. Other atrazine runoff management options, including adoption of alternative tillage practices such as conservation and no-till as well as splitting applications between fall and spring, were marginally effective.

Full Text

Duke Authors

Cited Authors

  • Harman, WL; Wang, E; Williams, JR

Published Date

  • January 2004

Published In

Volume / Issue

  • 33 / 1

Start / End Page

  • 7 - 12

PubMed ID

  • 14964353

Pubmed Central ID

  • 14964353

International Standard Serial Number (ISSN)

  • 0047-2425

Digital Object Identifier (DOI)

  • 10.2134/jeq2004.7000

Language

  • eng

Conference Location

  • United States