FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Clay
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Silt
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Sand
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Loam
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Detailed explanation-1: -Organic soils are not suitable for compaction and construction purposes so they will not be discussed any further. Coarse-grained soils are essentially granular and can be broken into two subcategories, gravel and sand.
Detailed explanation-2: -For compacting sandy and gravelly soil, vibratory rollers are most effective. If granular soils have some fines, both smooth wheel and pneumatic rollers can be used. Proper control of moisture content in soil is necessary for achieving desired density.
Detailed explanation-3: -Sandy loams are the most susceptible to compaction because they generally have some structure, which provides macropores in the soil system, but the structure is very weak. The term ‘weak’ means that the cohesive forces holding the particle together can be easily overcome and the particles can move into the macropores.