FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The color of the soil indicates some chemical conditions.
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Dark or black color soil indicates high organic matter
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Dark or black color soil indicates that the soil is high in oxides of iron
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Dark or black color soil indicates that the soil is at oxidized state
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All of the above
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Explanation:
Detailed explanation-1: -Dark brown or black colors typically indicate that the soil has a high organic matter content. Organic matter coats mineral soil particles, which masks or darkens the natural mineral colors. Sodium content also influences the depth of organic matter and therefore the soil color.
Detailed explanation-2: -VALUES tell you how dark the soil is; A horizons are darker, with a lower value (2 or 3) due to humus. E horizons are often light colored (5 or 6 value).
Detailed explanation-3: -In surface horizons, a dark color indicates high organic matter content. Organic matter, in turn, is responsible for many desirable physical and chemical soil properties.
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