Changing concepts in soil classification. The structure of
Changing concepts in soil classification. The structure of
Changing concepts in soil classification. The structure of
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Current <strong>structure</strong> and pr<strong>in</strong>ciples<br />
<strong>The</strong> taxonomic units <strong>of</strong> the WRB are based on<br />
diagnostic (reference) horizons, <strong>soil</strong> properties<br />
and/or <strong>soil</strong> materials.<br />
First level: 30 Reference Soil Groups (def<strong>in</strong>ed by<br />
key)<br />
Lower level (s) are def<strong>in</strong>ed by set <strong>of</strong> prefixes as<br />
unique qualifiers added to the reference <strong>soil</strong><br />
groups.