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Assessing the physical characteristics of soil

Types of aggregates in soil

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Structural unit Type Occurrence
Single Grain Single grain sandy or loamy soil
Granular Granular in dark surface soil
Platy Platy in pale subsurface soil
Blocky Blocky in clay-enriched subsoil, especially in forested areas
Prismatic Prismatic in subsoil, particularly in grassland
Columnar Columnar in sodium-affected subsoil in grassland
Massive Massive compacted material or lightly decomposed parent material
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