Monthly Archives: April 2012

The Twelve Soil Orders

At its most basic level, the world’s soil falls into just twelve groups. Gelisols, Histosols, Spotosols, Andisols, Oxisols, Vertisols, Ardisols, Ultisols, Mollisols, Alfisols, Inceptisols, Entisols—the Twelve Soil Orders sound to me like an alliance, sitting about a round table and … Continue reading

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