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The top documents tagged [natric horizon]
World reference base
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Soil Quality: The view through the prism of Soils 101 D.W. Johnson Natural Resources and Environmental Science University of Nevada, Reno
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SOILS IN NORTH AMERICA
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Order (12) Suborder (~ 65) Family (~ 8,000) Great Group (~ 250) Subgroup (~ 1,500) Series (~ 20,000) (in U.S)
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