Soil Sc enlists Revisit a Hgh-lntensity Soil Survey in Northwest Ilinois with Eectromagnetc lnduction and Traditional Methods

摘要

Electromagnetic induction (EMI) and global positioning system (GPS) data were used with geographical information system (GIS) to improve a high intensity soil survey that was completed with traditional methods in northwest Illinois. Apparent conductivity (EC_a) maps provided additional layers of information, which improved knowledge of soils and directed soil sampling. The information provided by EC_a maps and additional soil sampling led soil scientists to recognize different soils and modify mapping concepts. Within the site, EC_a maps assisted the identification and delineation of soil polygons and improved the quality of the high-intensity soil map. While spatial EC_a patterns influenced the judgments of soil scientists, EC_a maps were not accepted as a substitute for a high-intensity soil map.