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Figure 18.11--Current and future carbon inventory in southern forests by (Personal Communication. 2000. L.S. Heath, Project Leader, and J.E. Smith, Plant Physiologist, Northeastern Research Station, 11 Campus Blvd., Newtown Square, PA 19073) [estimates based on 1997 USDA Forest Service Forest Inventory and Analysis data and FORCARB results (note that carbon in products is not included)].

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Carbon inventory in tons per acre, by year and by compartment:

	1990	2000	2010	2020	2030	2040
Trees	5.04	5.31	5.47	5.43	5.26	4.99
Soil	5.79	5.88	5.97	6.10	6.18	6.28
Forest Floor	0.41	0.42	0.42	0.42	0.42	0.40
Understory	0.26	0.26	0.26	0.27	0.27	0.27