Northern Global Change Research Program

The Potential of U.S. Forest Soils to Sequester Carbon and Mitigate the Greenhouse Effect

Metric Unit Data

Table 1	Table 2
Table 2a	Table 3
Table 4	Table 4a
Table 5	Table 6
Table 6a	Table 7
Table 8	Table 9
Table 9a	Table 9b
Table 10	Table 11
Table 12	Table 13
Table 14	Table 15
Table 16	Table 17
Table 18	Table 18a
Table 19	Table 20
Table 21	Table 22
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Chapter 2: Current and Historical Trends in Use, Management and Disturbance of United States Forest Lands-Metric Unit Data
by Richard A. Birdsey & George M. Lewis

Table 22. Area of forest land by forest class, Puerto Rico, 1980-1990¹.

	1980	1990
	(Thousand ha)
Forest class
Timberland:
Nonstocked and xeric areas	11.7	4.2
Active coffee shade	21.4	7.0
Abandoned coffee	38.2	23.4
Secondary forest	59.2	113.6

Other forest land	148.2	139.3
Total	278.7	287.4
¹From Birdsey and Weaver (1982) and Franco et al. (1997).

Users of these tables are kindly requested to cite their source:
Birdsey, Richard A.; Lewis, George M. 2002. Current and Historical Trends in Use,
Management and Disturbance of United States Forest Lands. IN: Kimble, John et al. (eds.),
The Potential of U.S. Forest Soils to Sequester Carbon and Mitigate the Greenhouse Effect.
Boca Raton, Florida: CRC Press. XXX p.

Page Contact: Kevin McCullough