Managing Global Resources for a Secure Future

2017 Annual Meeting | Oct. 22-25 | Tampa, FL

347-8 Comparing Performance of Mn-Coated and Fe-Coated IRIS Devices.

Poster Number 1110

See more from this Division: SSSA Division: Wetland Soils
See more from this Session: Wetland Soils General Poster (includes student competition)

Wednesday, October 25, 2017
Tampa Convention Center, East Exhibit Hall

Martin C. Rabenhorst, Environmental Science & Technology, University of Maryland, College Park, MD, Patrick J. Drohan, Pennsylvania State University, University Park, PA, John M. Galbraith, Department of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA, Brian A. Needelman, 1213 HJ Patterson Hall, University of Maryland, College Park, MD, Lesley Spokas, School of Earth and Sustainability, University of Massachusetts, Amherst, MA, Mark Stolt, 112 Kingston Coastal Institute Bldg, University of Rhode Island, Kingston, RI, James A. Thompson, Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV, Bruce L. Vasilas, 531 S. College Ave., University of Delaware, Newark, DE and Karen L. Vaughan, WY, University of Wyoming, Laramie, WY
Abstract:
Over the last decade, Fe-coated IRIS tubes have moved into common use for documenting reducing conditions in soils, and have been approved by the NTCHS for use as part of the Technical Standard for Hydric Soils. However, Fe oxides are reduced only under strongly reducing conditions, while important hydric soil (and wetland) functions and services (such as denitrification) occur under less intensely reducing, anaerobic conditions. Thus, there has been interest in exploring Mn-coated tubes to document moderately reducing soil conditions. Recently, a Mn oxide (birnessite) paint was developed that can be applied to PVC much like the Fe oxide (ferrihydrite-goethite) paint, such that a durable coating is easily achieved. As part of the NE1438 Multistate Research Project (Hydropedology of Vernal Pool Systems) both Fe-coated tubes and Mn-coated tubes were tested at 8 locations across the country. Five replicate tubes of each type were installed (paired) in plots along 3-point transects that spanned a range in hydrological conditions. This paper and poster will report on the performance of the Mn-coated and Fe-coated devices relative to each other and also in comparison with environmental variables.

See more from this Division: SSSA Division: Wetland Soils
See more from this Session: Wetland Soils General Poster (includes student competition)