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2007 NCERA-180 Annual Meeting

2007 NCERA-180 Annual Meeting. Veris NIR Spectrophotometer. www.veristech.com. Acquisition/Sampling Procedure. Map field NIRS at 10 cm level with Veris NIRS shank unit (15 m transects typical). PC compression and remove outliers. Fuzzy clustering into 15 clusters (use 3 PC’s).

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2007 NCERA-180 Annual Meeting

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  1. 2007 NCERA-180 Annual Meeting

  2. Veris NIR Spectrophotometer

  3. www.veristech.com

  4. Acquisition/Sampling Procedure • Map field NIRS at 10 cm level with Veris NIRS shank unit (15 m transects typical). • PC compression and remove outliers. • Fuzzy clustering into 15 clusters (use 3 PC’s). • Select 1 sample location per cluster (software). • 5) Software guidance to sample locations.

  5. Calibration Procedure • Lab-analyze soil carbon and bulk density (and other properties of interest). • Calibrate NIRS data with lab analyses and validate. (Client responsible)

  6. IOWA

  7. GEORGIA

  8. KANSAS

  9. MONTANA

  10. ILLINOIS: Lab results-Amino N NIRS—Amino N

  11. Carbon Sequestration Validation Problem: Soil carbon levels and rates of carbon change vary in the X, Y and –Z directions. This variability occurs at close spatial ranges within a field, and often exceeds the amount of newly sequestered carbon. • Goal: carbon inventory to 60 cm depth • Map NIRS at 10 cm level with Veris NIRS shank unit. • Use shank NIR (PCA, fuzzy c-means clustering) to identify 15 sample points for NIRS probe and soil cores. • Collect NIRS data to 60 cm and 3” diameter soil cores (large diameter to minimize probe effect on bulk density). • Segment cores into 10 cm segments. • Use probe NIRS (PCA, fuzzy c-means clustering) to identify 15 10 cm segments for lab analysis (each 10 cm level represented with at least two lab analyses). • Analyze soil carbon and bulk density in lab • Calibrate NIRS data with lab analyses and cross-validate.

  12. Grand Ave carbon inventory project—materials and methods

  13. Acknowledgement Funding for NIRS research provided by the Small Business Innovation Research programs of the U.S. Departments of Agriculture and Energy

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