Soil Struture
Definitions & Types
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Granular Structure s spherical shaped aggregates bounded by curved or very irregular surfaces which have slight or no accommodation to the faces of the adjoining ped faces. Particles are arranged around a point.
Sub-angular Blocky Structure is block like aggregation. The blocks are polyhedrons bounded by flattened or rounded faces and have rounded corners. The faces are casts or molds formed by the faces of the adjoining peds. Particles are arranged around a point.
Platy Structure is plate-like aggregates with horizontal dimensions considerably greater than the vertical dimension. Particles are arranged about a horizontal plane.
Prismatic Structure is prism-like aggregates with vertical dimension considerably greater than horizontal dimension. Particles are arranged about a vertical line. Peds are bounded by vertical faces which are casts or the molds formed by the faces of adjoining peds and have flat caps.
Columnar Structure is similar to a prismatic structure except that it has rounded caps.
Single Grained Structure has no observable aggregation. Individual particles are non-coherent and easily distinguishable.
Massive Structure has no observable aggregation. Individual particles are coherent, but the mass lacks planes of weakness.
Bulk Density
Procedure |
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Fill the soil core (3"metal cylinder) use mallet to drive metal core into the soil
Use a trowel to remove soil core by digging around core.
Make sure the core is completely filled with soil Use a knife to level off both ends of the core
Slowly remove soil from the soil core place in ziplock bag or paper bag
Label the soil sample location, group names, date
Collect at least two samples per site
Lab Analysis |
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