Soil Taxonomy and Soil Geography

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Soil Taxonomy and Soil Geography
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DiagnosticHorizonsTable 3.1
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Soil Orders Table 3.3
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Suborders Table 3.6
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Great Groups Table 3.7
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Families Table 3.9
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Some subsurface horizon (not argillic) Or Umbric
surface horizon (low base saturation)
Degree of Weathering -mild
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Degree of Weathering -mild
Andic soil properties -on volcanic
ejecta Mellanic epipedon
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Organic soil material gt 40 cm thick wet
conditions
Degree of Weathering -slight
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Gellic soil properties Perma-frost
Degree of Weathering -slight
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Some subsurface horizon, Aridic moisture regime
Degree of Weathering -intermediate
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gt35 clay Cracks to 50 cm Evidence of movement
Degree of Weathering -intermediate
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• Mollic epipedon
• 50 B.S.
• gt 25 cm thick

Degree of Weathering -intermediate
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Degree of Weathering -intermediate
Argillic gt35 B.S.
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Spodic horizon
Degree of Weathering -intermediate
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Degree of Weathering -intermediate
Argillic horizon lt 35 B.S.
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Oxic horizon
Degree of Weathering -strong
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