FORESTRY
SOIL SCIENCE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which type of soil has a DARK BROWN color?
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sand
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loam
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clay
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None of the above
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Explanation:
Detailed explanation-1: -Soils high in humus and decomposing organic matter are dark brown to black. Humus is dark in color because it has a high mineral content; it can also absorb and drain water.
Detailed explanation-2: -Many soils are brown in color because they contain large amounts of carbon. In particular, carbon-containing polymers called humic compounds absorb most visible wavelengths of light and give soils a dark brown appearance.
Detailed explanation-3: -Loam (in geology and soil science) is soil composed mostly of sand (particle size > 63 micrometres (0.0025 in)), silt (particle size > 2 micrometres (7.9×10−5 in)), and a smaller amount of clay (particle size < 2 micrometres (7.9×10−5 in)).
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