“Primary Diagnostic Horizons”的意思、由来-百科全书

Primary Diagnostic Horizons

Table

Primary diagnostic horizons of soil

U.S. Soil Taxonomy defining features FAO soil group system

See as table:

Epipedons

histic thick organic layer histic

. mollic thick, dark, neutral to alkaline mollic

ochric pale or thin ochric

. umbric thick, dark, acidic umbric

Subsurface horizons

argillic clay mineral deposition argic

. cambic in situ mineral weathering only cambic

oxic highly weathered; aluminum oxide,

iron oxide, and kaolin clay deposition ferralic

. spodic aluminum oxide, iron oxide,

and humus deposition spodic

See as table:

词条	Primary Diagnostic Horizons
释义	Primary Diagnostic Horizons Table Primary diagnostic horizons of soil U.S. Soil Taxonomy defining features FAO soil group system See as table: Epipedons histic thick organic layer histic . mollic thick, dark, neutral to alkaline mollic ochric pale or thin ochric . umbric thick, dark, acidic umbric Subsurface horizons argillic clay mineral deposition argic . cambic in situ mineral weathering only cambic oxic highly weathered; aluminum oxide, iron oxide, and kaolin clay deposition ferralic . spodic aluminum oxide, iron oxide, and humus deposition spodic See as table:
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