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- · Keys to Soil Taxonomy. 6th ed. Washington, D.C.: USDA Soil Conservation Survey, Thiern. G....
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· Keys to Soil Taxonomy. 6th ed. Washington, D.C.: USDA Soil Conservation Survey, Thiern. G. 1906. Hvdroligische Methoden. Leipzig, Germany: Gephardt. ... 24% if the soil texture
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