Particle density vs bulk density
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Particle density
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Bulk density
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1. The weight per unit volume of solid portion of soil is called particle density.
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1. The weight per unit bulk volume of oven dry soil is called bulk density.
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2. The volume includes only soil solids.
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2. The volume includes both soil solids and pore space.
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3. It is expressed by the following formula, P.D=Ms/Vs gm/cc. where Ms= Mass of solid portion of soil. Vs= Volume of solid portion of soil.
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3. It is expressed by the following formula, B.D=Ms/Vt gm/cc. where, Ms=Mass of dry soil. Vt=Total volume of soil.
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4. Particle density of mineral soil ranges from 2.6-2.75 gm/cc.
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4. Bulk density of mineral soil ranges from 1.0-1.8gm/cc.
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5. Particle density of organic soil ranges from 1.2-1.7 gm/cc.
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5. Bulk density of organic soil is about 0.5 gm/cc.
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6. It does not depend on soil texture, structure and porosity.
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6. It depends on soil texture, structure and porosity.
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7. Particle density of a soil is always higher than bulk density.
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7. Bulk density of a soil is always lower than particle density.
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