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  2. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    Soil bulk density is equal to the dry mass of the soil divided by the volume of the soil; i.e., it includes air space and organic materials of the soil volume. Thereby soil bulk density is always less than soil particle density and is a good indicator of soil compaction. [47]

  3. Bulk density - Wikipedia

    en.wikipedia.org/wiki/Bulk_density

    Bulk density is not the same as the particle density, which is an intrinsic property of the solid and does not include the volume for voids between particles (see: density of non-compact materials). Bulk density is an extrinsic property of a material; it can change depending on how the material is handled.

  4. Porosity - Wikipedia

    en.wikipedia.org/wiki/Porosity

    Aggregation involves particulate adhesion and higher resistance to compaction. Typical bulk density of sandy soil is between 1.5 and 1.7 g/cm 3. This calculates to a porosity between 0.43 and 0.36. Typical bulk density of clay soil is between 1.1 and 1.3 g/cm 3. This calculates to a porosity between 0.58 and 0.51.

  5. Particle technology - Wikipedia

    en.wikipedia.org/wiki/Particle_technology

    Particle technology is the science and technology of handling and processing particles and powders. It encompasses the production, handling, modification, and use of a wide variety of particulate materials, both wet and dry. Particle handling may include transportation and storage. Particle sizes range from nanometers to centimeters.

  6. Hausner ratio - Wikipedia

    en.wikipedia.org/wiki/Hausner_ratio

    The Hausner ratio is calculated by the formula = where is the freely settled bulk density of the powder, and is the tapped bulk density of the powder. The Hausner ratio is not an absolute property of a material; its value can vary depending on the methodology used to determine it.

  7. Particle mass density - Wikipedia

    en.wikipedia.org/wiki/Particle_mass_density

    The particle mass density or particle density of a material (such as particulate solid or powder) is the mass density of the particles that make up the powder. Particle density is in contrast to the bulk density , which measures the average density of a large volume of the powder in a specific medium (usually air ).

  8. Pedotransfer function - Wikipedia

    en.wikipedia.org/wiki/Pedotransfer_function

    The first PTF came from the study of Lyman Briggs and McLane (1907). They determined the wilting coefficient, which is defined as percentage water content of a soil when the plants growing in that soil are first reduced to a wilted condition from which they cannot recover in an approximately saturated atmosphere without the addition of water to the soil, as a function of particle-size:

  9. Particle density - Wikipedia

    en.wikipedia.org/wiki/Particle_density

    Particle density may refer to: Particle density (packed density) , density of material that particles are composed of Particle density (particle count) , average number of particles in unit volume or unit area