Soil color does not affect the behavior and use of the soil; However, this may indicate the composition of the soil and provide clues to the conditions of the affected soil. The soil can show various colors; gray, black, white, red, brown, yellow and under proper green conditions. Varying the horizontal lines of color on the ground often identifies the horizon of a particular soil. Development and distribution of color in soils resulting from chemical and biological weathering, especially redox reactions. As a major mineral in the soil parent material, the elements combine to become new and colorful compounds. Soil conditions produce uniform or gradual color change, while reducing the environment produces a distorted flow of color with intricate patterns, spots and dots of color concentration.
Video Soil color
Cause
The color of the soil is produced by the existing minerals and by the organic matter content. Yellow or red soil indicates oxidized iron oxide oxides. Dark brown or black on the ground indicates that the soil has a high content of organic matter. The wet soil will appear darker than the dry land. However, the presence of water also affects the color of the soil by affecting the rate of oxidation. Soils that have a high water content will have less air in the soil, especially less oxygen. In well-drained soil (and therefore oxygen-rich) the red and brown color caused by oxidation is more common, as opposed to in wet soil (low oxygen) where the soil usually appears gray or greenish due to the presence of iron oxide (iron) which is reduced. The presence of other minerals can also affect the color of the soil. Manganese oxide causes black, glauconite makes the soil green, and calcite can make the soil in dry areas look white.
Organic materials tend to make the soil color darker. Humus, the last stage of breaking organic matter is black. Throughout the breaking step of organic matter, the colors delivered to the ground vary from brown to black. The sodium content affects the color depth of organic matter and therefore the soil. Sodium causes organic matter (humus) to spread faster and spread to soil particles, making the soil appear darker (darker).
Maps Soil color
Classification
Often described using common terms, such as dark chocolate, yellowish brown, etc., Soil color is also explained more technically by using Munsell's ground color chart, which separates colors into color components (related to red, yellow and blue), values (light or dark) and chroma (pale or strength).
References
Further reading
- "Land Color". United States Department of Agriculture - Natural Resources Conservation Service. Archived from the original in 2007-10-27 . Retrieved 2007-11-25 .
- "Soil Color Contrast". United States Department of Agriculture - Natural Resources Conservation Service. Archived from the original in 2007-11-12 . Retrieved 2007-11-25 .
- "Why is the ground brown" . Retrieved 2007-11-25 .
Source of the article : Wikipedia
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