FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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25% Water, 25% Air, 45% Inorganic matter, 5% Organic matter,
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25% Water, 25% Air, 5% Inorganic matter, 45% Organic matter,
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50% porespace, 50% solid
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40% porespace, 60% solid
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Detailed explanation-1: -There is more to soil than weathered rocks (minerals) and worms. In fact, a typical soil is comprised of 50% solids and 50% pore (empty) space. To break that down even further a typical mineral soil is comprised of 45% minerals, 5% organic matter, 25% air, and 25% water.
Detailed explanation-2: -The largest component of soil is the mineral portion, which makes up approximately 45% to 49% of the volume. Soil minerals are derived from two principal mineral types.
Detailed explanation-3: -The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air. These percentages are only generalizations at best.
Detailed explanation-4: -An ideal soil would be made up of 45% minerals (sand, clay, silt), 5 % organic (plant and animal) material, 25% air and 25% water. The mineral portion would be loam (20 – 30% clay, 30 – 50% silt and 30 – 50% sand).