Analysis of Total C, N, P Contents Loading in Soil Cores Over 10+ Years From Horicon Marsh in Dodge County, WI.

The surrounding upland area is largely an agricultural landscape and significant runoff events deposit nutrient loads onto the marsh. This study aims to identify the locations of the significant nutrient loading events through the creation of a 3-D soil nutrient map based on data collected from soil cores. Sampling sites were positioned every ¼ mile apart along the east-west transects throughout the marsh. A soil core was obtained at each and subsequently cut into five centimeter segments, oven dried, and analyzed for total nitrogen, carbon, and phosphorus concentrations. The data will enable (1) the evaluation of land management techniques of the surrounding upland landscape, (2) the further understanding of nutrient movement through wetland soil, and (3) the impact of nutrient loads on Horicon Marsh.