/AnMtgsAbsts2009.52982 P Mobility in Ditch Soil Mesocosms.

Tuesday, November 3, 2009
Convention Center, Exhibit Hall BC, Second Floor

David Ruppert1, Brian Needelman1, Martin Rabenhorst1, Bruce James1, Peter Kleinman2 and Bahram Momen1, (1)Univ. of Maryland, College Park, MD
(2)USDA-ARS, University Park, PA
Abstract:
On the Eastern Shore of Maryland drainage ditches and poultry-based farming systems are ubiquitous. As a result phosphorus (P) in groundwater and its escape to surficial waters is a concern. In this experiment 66 mesocosms have been subjected to hydraulic and surficial-pedologic treatments designed to mimic natural and common management strategies. Such techniques include ditch cleanouts and O-material buildup, and field capacity and saturated hydrologies as well as a hydrologic treatment which cycles between field capacity and saturation. Oxalate-extraction-based mineralogical changes as well as trends in redox, pH, and  P sorbtion/release will be reported.