2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM

Paper No. 3
Presentation Time: 8:00 AM-6:00 PM

Evaluation of the Predictors of SOC Stock at a Regional Scale

MISHRA, Umakant1, LAL, Rattan1, SLATER, Brian1 and LIU, Desheng2, (1)Ohio State University, 2021 Coffey Road, 210 Kottman Hall, Columbus, OH 43210, (2)Department of statistics and Geography, The Ohio State University, 1036 DERBY, 154 N OVAL MALL, Columbus, OH 43210, mishra.24@osu.edu

Soil organic carbon (SOC) pool is an important component in the global carbon (C) cycle as it contains more C than the atmosphere and biosphere together. SOC stock at a location is impacted by various factors and these factors differ at different locations. This study attempts to use different predictors of SOC at different major land resource areas (MLRAs) to map the SOC stock at a regional scale. Therefore, geographic weighted regression is used to map the SOC stock across the 7 States of Midwestern U.S. (Michigan, Indiana, Ohio, Pennsylvania, Kentucky, West Virginia, and Maryland). A total of 1422 SOC profile samples are used in this study. The data of environmental variables (elevation, temperature, rainfall, land use) that are supposed to impact the SOC stock are extracted from the secondary data sources. The results will be presented at the SSSA meeting.