You are here: Home
/ Publication Information
Title: Sediment removal by prairie filter strips in row-cropped ephemeral watersheds
Author: Helmers, Matthew J.; Zhou, Xiaobo; Asbjornsen, Heidi; Kolka, Randy; Tomer, Mark D.; Cruse, Richard M.;
Source: Journal of Environment Quality. 41(5): 1531-1539.
Publication Series: Scientific Journal (JRNL)
Description: Twelve small watersheds in central Iowa were used to evaluate the eff ectiveness of prairie filter strips (PFS) in trapping sediment from agricultural runoff. Four treatments with PFS of different size and location (100% rowcrop, 10% PFS of total watershed area at footslope, 10% PFS at footslope and in contour strips, 20% PFS at footslope and in contour strips) arranged in a balanced incomplete block design were seeded in July 2007. All watersheds were in bromegrass (Bromus L.) for at least 10 yr before treatment establishment. Cropped areas were managed under a no-till, 2-yr corn (Zea mays L.)-soybean [Glycine max. (L.) Merr.] rotation beginning in 2007. About 38 to 85% of the total sediment export from cropland occurred during the early growth stage of rowcrop due to wet field conditions and poor ground cover. The greatest sediment load was observed in 2008 due to the initial soil disturbance and gradually decreased thereafter. The mean annual sediment yield through 2010 was 0.36 and 8.30 Mg ha-1 for the watersheds with and without PFS, respectively, a 96% sediment trapping efficiency for the 4-yr study period. The amount and distribution of PFS had no significant impact on runoff and sediment yield, probably due to the relatively large width (37-78m) of footslope PFS. The findings suggest that incorporation of PFS at the footslope position of annual rowcrop systems provides an effective approach to reducing sediment loss in runoff from agricultural watersheds under a no-till system.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
XML: View XML
Helmers, Matthew J.; Zhou, Xiaobo; Asbjornsen, Heidi; Kolka, Randy; Tomer, Mark D.; Cruse, Richard M. 2012. Sediment removal by prairie filter strips in row-cropped ephemeral watersheds. Journal of Environment Quality. 41(5): 1531-1539.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility