Soil may be considered a porous three phase system composed of air, water, and solids. The relative distribution of these three components is important to understanding the hydraulic properties of the soil. Porosity is a measure of the volume of air and water-filled pores in the soil. The STATSGO database does not contain a direct measure of soil pore space. However, a value for porosity can be calculated from the bulk density (BD) and particle density (PD), the ratio of the mass of all solid particles to the volume of the solids.
Sand, Silt, Clay Fractions | Rock Fragment Class | Rock Fragment Volume Bulk Density | Porosity | Permeability Available Water Capacity | pH | Plasticity K-Factor | Hydrologic Soil Groups | Curve Numbers | ||||

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Comments and Questions 4/19/99 |