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Spectrophotometric measurement of soil color and its relationship to moisture and organic matter

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dc.contributor.authorPaul, E. A., author
dc.contributor.authorShields, J. A., author
dc.contributor.authorHead, W. K., author
dc.contributor.authorSt. Arnaud, R. J., author
dc.contributor.authorAgricultural Institute of Canada, publisher
dc.date.accessioned2007-01-03T06:11:47Z
dc.date.available2007-01-03T06:11:47Z
dc.date.issued1968-10
dc.description.abstractThe color of soil samples taken from the Ap horizons of Chernozemic and Gray Wooded (Podzolic) soils was measured spectrophotometrically at moisture levels ranging from air-dryness to field capacity. The Munsell re-notations "hue", "value" and "chroma" were related to the moisture content and the amount and nature of the soil organic matter. The addition of moisture to the Ap horizons from Chernozemic and Gray Wooded soils caused a significant decrease in value but had little effect on the hue and chroma. In Chernozemic soils the average decrease in value was 1.0 unit. This darkening in color occurred primarily in the moisture range between air-dryness and 18%. The decrease in Gray Wooded soils averaged 1.7 units and it occurred throughout the moisture range from air-dryness to 30%. The Gray Wooded soils were significantly higher in color value per unit of organic matter than were the Chernozemic soils. Differences were found in the ultraviolet reflectance spectra of these two kinds of soils and in the E4:E6 ratios of alkali extracts. The ratio of humic to fulvic acid and the amounts of 0.5 N NaOH-extractable humic acid also differed for the Gray Wooded and the Chernozemic soils.
dc.format.mediumborn digital
dc.format.mediumarticles
dc.identifier.bibliographicCitationShields, J. A., E. A. Paul, R. J. St. Arnaud, and W. K. Head, Spectrophotometric Measurement of Soil Color and its Relationship to Moisture and Organic Matter. Canadian Journal of Soil Science 48, no. 3 (October 1968): 271-280. https://dx.doi.org/10.4141/cjss68-037.
dc.identifier.doihttps://dx.doi.org/10.4141/cjss68-037
dc.identifier.urihttp://hdl.handle.net/10217/81101
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartofFaculty Publications
dc.rights©1968 Agricultural Institute of Canada.
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectorganic fractions
dc.subjectmoisture content
dc.subjectsoil samples
dc.subjectinstrumental measurement
dc.subjectmoist soil
dc.subjectdry soil
dc.subjectorganic carbon
dc.titleSpectrophotometric measurement of soil color and its relationship to moisture and organic matter
dc.typeText

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Spectrophotometric measurement of soil color and its relationship to moisture and organic matter
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