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USDA Soil taxonomy

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United States Department of Agriculture soil taxonomy

compare World Reference Base for Soil Resources

Alfisols

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Andisols

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Aridisols

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Entisols

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Gelisols

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Histosols

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Inceptisols

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Mollisols

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Oxisols

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Spodosols

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Ultisols

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Vertisols

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