Carbon and nitrogen analysis of soil fractions using near-infrared reflectance spectroscopy

M. J. Morra, M. H. Hall, L. L. Freeborn

Research output: Contribution to journalArticlepeer-review

165 Scopus citations

Abstract

A nondestructive method to determine total C and N concentrations in soil size fractions is desirable when a limited sample is available. Near-infrared reflectance spectroscopy (NIRS) was used to determine the total C and N concentration in silt (50.0-2.0 μm) and coarse clay (2.0-0.2 μm), separated from 12 surface soils, by regressing the diffuse reflectance of near-infrared radiation with constituent concentrations determined using combustion techniques. Equation development with only silt samples improved the accuracy of NIRS calibration equations. It is concluded that NIRS can be used to predict C and N concentrations in soil size fractions. -from Authors

Original languageEnglish (US)
Pages (from-to)288-291
Number of pages4
JournalSoil Science Society of America Journal
Volume55
Issue number1
DOIs
StatePublished - Jan 1 1991

All Science Journal Classification (ASJC) codes

  • Soil Science

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