Advances in spectroscopic methods for quantifying soil carbon

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Abstract

The gold standard for soil C determination is combustion. However, this method requires expensive consumables, is limited to the determination of the total carbon and in the number of samples which can be processed (~100/d). With increased interest in soil C sequestration, faster methods are needed. Thus, interest in methods based on diffuse reflectance spectroscopy in the visible, near-infrared or mid-infrared ranges using either proximal or remote sensing. These methods have the ability to analyze more samples (2 to 3X/d) or huge areas (imagery) and do multiple analytes simultaneously, but require calibrations relating spectral and reference data and have specific problems, i.e., remote sensing is capable of scanning entire watersheds, thus reducing the sampling needed, but is limiting to the surface layer of tilled soils and by difficulty in obtaining proper calibration reference values. The objective of this discussion is the present state of spectroscopic methods for soil C determination.

Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title Advances in spectroscopic methods for quantifying soil carbon
DOI 10.1016/B978-0-12-386897-8.00020-6
Year Published 2012
Language English
Publisher Academic Press
Publisher location London; Waltham, MA
Contributing office(s) Eastern Geographic Science Center
Description 21 p.
Larger Work Type Book
Larger Work Title Managing agricultural greenhouse gases coordinated agricultural research through GRACEnet to address our changing climate
First page 345
Last page 366
Online Only (Y/N) N
Additional Online Files (Y/N) N