 |
Chapter 2: Current and Historical
Trends in Use, Management and Disturbance of United States Forest
Lands-English Unit Data
by Richard A. Birdsey & George M. Lewis
Table 4a. Gain of forest land (afforestation)
by region and previous nonforest class, conterminous U.S., 1907-19971.
| Region
and |
1907
|
1939
|
1954
|
1964
|
1978
|
1988
|
Total 1907
|
| nonforest
class |
(million ac)
|
|
| Northeast |
|
|
|
From cropland |
2.18
|
2.31
|
5.58
|
0.45
|
0.52
|
0.49
|
11.52
|
|
From pasture and range land |
5.09
|
5.38
|
2.39
|
4.04
|
2.04
|
1.83
|
20.76
|
|
From other nonforest |
0.07
|
0.08
|
0.87
|
0.94
|
0.54
|
0.99
|
3.49
|
| Total
from nonforest |
7.34
|
7.76
|
8.84
|
5.43
|
3.10
|
3.31
|
35.77
|
|
|
| North
Central |
|
|
From cropland |
0.29
|
0.19
|
0.77
|
0.15
|
0.28
|
0.52
|
2.18
|
|
From pasture and range land |
2.57
|
1.67
|
1.15
|
1.32
|
2.78
|
4.09
|
13.57
|
|
From other nonforest |
0.34
|
0.22
|
0.54
|
0.74
|
0.55
|
1.69
|
4.08
|
| Total
from nonforest |
3.20
|
2.07
|
2.46
|
2.21
|
3.61
|
6.30
|
19.84
|
|
|
| Southeast |
|
|
From cropland |
4.35
|
4.64
|
2.85
|
0.84
|
1.42
|
2.21
|
16.31
|
|
From pasture and range land |
2.90
|
3.09
|
1.22
|
1.95
|
1.03
|
2.02
|
12.21
|
|
From other nonforest |
0.04
|
0.04
|
0.11
|
0.23
|
0.25
|
0.54
|
1.21
|
| Total
from nonforest |
7.29
|
7.78
|
4.18
|
3.02
|
2.70
|
4.77
|
29.73
|
|
|
| South
Central |
|
|
From cropland |
6.14
|
6.09
|
4.25
|
1.34
|
0.71
|
1.26
|
19.79
|
|
From pasture and range land |
6.14
|
6.09
|
1.06
|
5.35
|
3.09
|
5.40
|
27.14
|
|
From other nonforest |
0.15
|
0.14
|
0.27
|
0.31
|
0.40
|
0.60
|
1.87
|
| Total
from nonforest |
12.43
|
12.32
|
5.58
|
7.00
|
4.21
|
7.26
|
48.80
|
|
|
| Great
Plains |
|
|
From cropland |
0.31
|
0.27
|
0.60
|
0.09
|
0.00
|
0.02
|
1.29
|
|
From pasture and range land |
0.73
|
0.62
|
0.26
|
0.21
|
0.16
|
0.95
|
2.93
|
|
From other nonforest |
0.00
|
0.00
|
0.00
|
0.00
|
0.01
|
0.07
|
0.09
|
| Total
from nonforest |
1.05
|
0.89
|
0.86
|
0.30
|
0.17
|
1.04
|
4.30
|
|
|
| Intermountain |
|
|
From cropland |
0.07
|
0.07
|
0.15
|
0.10
|
0.01
|
0.01
|
0.41
|
|
From pasture and range land |
0.61
|
0.59
|
2.80
|
1.95
|
1.59
|
2.43
|
9.97
|
|
From other nonforest |
0.02
|
0.02
|
0.09
|
0.18
|
0.17
|
0.20
|
0.68
|
| Total
from nonforest |
0.70
|
0.68
|
3.04
|
2.23
|
1.76
|
2.64
|
11.05
|
|
|
| Pacific
Coast |
|
|
From cropland |
0.10
|
0.10
|
0.32
|
0.02
|
0.03
|
0.02
|
0.59
|
|
From pasture and range land |
0.24
|
0.23
|
0.76
|
0.07
|
0.55
|
0.78
|
2.62
|
|
From other nonforest |
0.00
|
0.00
|
0.04
|
0.04
|
0.04
|
0.10
|
0.23
|
| Total
from nonforest |
0.35
|
0.33
|
1.13
|
0.13
|
0.61
|
0.89
|
3.44
|
|
|
| Conterminous
U.S. |
|
|
From cropland |
13.44
|
13.65
|
14.51
|
2.98
|
2.96
|
4.53
|
52.08
|
|
From pasture and range land |
18.28
|
17.67
|
9.64
|
14.89
|
11.24
|
17.49
|
89.21
|
|
From other nonforest |
0.62
|
0.51
|
1.93
|
2.44
|
1.96
|
4.18
|
11.64
|
| Total from nonforest |
32.34
|
31.83
|
26.08
|
20.31
|
16.16
|
26.21
|
152.93
|
| 1 From various USDA and Census reports (see text). |
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.
|
Table
1
Table
4a 
