Figure 19.—Indicator A14, Alaska Redox.
This photo accompanies Figure 19.—Indicator A14, Alaska Redox) [Field Indicators of Hydric Soils in the United States].
This soil has a gleyed matrix with dominant color of N 7/ and 10Y 7/, with 10 percent or more distinct or prominent redox concentrations occurring as pore linings (and soft masses) with value and chroma of 4 or more. The layer occurs at a depth ≤30 cm (12 inches) from the soil surface.
In a soil layer that has been reduced, one of the first areas where oxygen will be reintroduced is along pores and the channels of live roots. As oxidation occurs in these areas, (with value and chroma of 4 or more) will be apparent along the pores and linings. These will stand out in contrast to the matrix color of the overall soil layer. First, determine if the dominant color(s) of the soil layer match the chroma 3 or less or gley colors indicated. Then break open pieces of the soil and look for reddish orange redox concentrations along pores and root linings. The occurrence of these concentrations indicates that the soil has been reduced during periods of saturation and is now oxidizing in a drier state.
Figure 19.—Indicator A14, Alaska Redox.
This photo accompanies Figure 19.—Indicator A14, Alaska Redox) [Field Indicators of Hydric Soils in the United States].
This soil has a gleyed matrix with dominant color of N 7/ and 10Y 7/, with 10 percent or more distinct or prominent redox concentrations occurring as pore linings (and soft masses) with value and chroma of 4 or more. The layer occurs at a depth ≤30 cm (12 inches) from the soil surface.
In a soil layer that has been reduced, one of the first areas where oxygen will be reintroduced is along pores and the channels of live roots. As oxidation occurs in these areas, (with value and chroma of 4 or more) will be apparent along the pores and linings. These will stand out in contrast to the matrix color of the overall soil layer. First, determine if the dominant color(s) of the soil layer match the chroma 3 or less or gley colors indicated. Then break open pieces of the soil and look for reddish orange redox concentrations along pores and root linings. The occurrence of these concentrations indicates that the soil has been reduced during periods of saturation and is now oxidizing in a drier state.