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