Evaluating the US Soil Taxonomy Soil Moisture Regimes

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Soil moisture class Soil temperature class Subgroup modifiers Van Wambeke proposed modifiers 1975 and 2010 Soil Taxonomy modifiers Yearly soil moisture and temperature estimates Numberof days per year soil is moist and above 5° C, 8° C, dry and above 5 or 8 Cumulative moist, dry, moist/drysoil days Annual and Summerwater balance
Aquic • Xeric bias toward westcoast • Ustic bias toward plains states • Nearabsenceof perudic
Page 1 and 2: Phillip Owens 1 , Edwin Winzeler 1
Page 3 and 4: Upper boundary - depth where 2.5 cm
Page 5 and 6: • Ustic - semi-arid climate - mod
Page 8 and 9: © Purdue University
Page 10 and 11: © Purdue University
Page 12 and 13: Monthly Air Temperature
Page 14 and 15: Smith, 1986, talking about the mois
Page 16 and 17: No consideration of soil drainage r
Page 20: Aquic
Page 27 and 28: Newhall Soil Moisture Regimes: Braz
Page 29: Soil climate governs many land uses
Page 32: Monthly Air Temperature
Page 35: Climate - long-term trends in weath

Evaluating the US Soil Taxonomy Soil Moisture Regimes

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