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Diffuse Reflectance Spectroscopy for the Characterization of Calcareous Glacial Till Soils from North Central Montana: Author: Steward, Genevieve Christine; Date: 2006-12-15; Program: Land Resources and Environmental Sciences; Abstract: Diffuse reflective spectroscopy (DRS) is a method of soil carbon (C) quantification. In this study, the Vis-NIR (350-2500 nm) and MIR (2500-25000 nm) regions were evaluated to determine respective predictive accuracies of soil organic and inorganic carbon (SOC and SIC, respectively). The dataset included 315 soil samples of glacial till origin, obtained from six independent farm sites within the Golden Triangle region of Montana, with depths ranging from 0-100 cm. For Vis-NIR analysis, Local vs. Regional vs. Global calibration sets were compared by six-fold cross validation by site of C predic...; Download File | View full details