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Published online 27 February 2006
Published in Soil Sci Soc Am J 70:590-600 (2006)
DOI: 10.2136/sssaj2005.0162
© 2006 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Quantity and Spatial Variability of Soil Carbon in the Conterminous United States

Yinyan Guo, Ronald Amundson*, Peng Gong and Qian Yu

Division of Ecosystem Sciences and Center for Assessment and Monitoring of Forest and Environmental Resources (CAMFER), 137 Mulford Hall, College of Natural Resources, Univ. of California, Berkeley, CA 94720-3114


Figure 1
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  		Fig. 1. Spatial distribution of soil organic C (SOC) content to 2-m soil depths in the conterminous USA (midpoint method).

 

Figure 2
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  		Fig. 2. Spatial distribution of soil inorganic C (SIC) content, to 2-m soil depths, in the conterminous USA (midpoint method).

 

Figure 3
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  		Fig. 3. Coefficient of variation (CV) of soil organic carbon (SOC) among soil components in taxa of each taxonomic category of each soil order, by soil depth (midpoint method).

 




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