Table 4.6—Simulated effects of selected futures on forage, wildlife, fish, and water, by region in the South, selected years 1985—2030—Continued 
(All projections at equilibrium levels) 
Increased 
management 
Natural Planted All intensity on 
High High Reduced regeneration pine Economic economic forest industry 
Improved — exports imports Reduced Reduced national on marginal on marginal opportunities opportunities timberlands in 
Base processing of timber of timber timberland timber forest cropland cropland on private on private Douglas-fir 
Item and year projection’ efficiency? products* products* area? growth® harvest’ and pasture* and pasture? timberlands!° lands!! region! 
Water—runoff _____ Inches per year 
Southeast 
1985 16.06 16.06 16.07 16.06 16.06 
1990 16.27 16.34 16.29 16.27 16.37 
2000 16.59 16.77 16.64 16.59 16.67 
2010 16.58 16.84 16.74 16.58 16.51 
2020 16.60 16.95 16.88 16.59 16.11 
2030 16.60 17.04 16.95 16.60 16.12 
South Central 
1985 15.46 15.45 15.46 15.46 15.46 
1990 15.50 15.53 15.50 15.50 15.57 
2000 15.76 15.85 15.76 15.75 15.81 
2010 16.06 16.21 16.10 16.05 15.99 
2020 16.06 16.27 16.12 16.05 15.71 
2030 16.12 16.39 16.19 16.12 15.77 
' The future as described by the basic assumptions and other specified and implied assumptions underlying the projections in chapter 3. 
The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by increasing softwood lumber and plywood 
yields by 25 percent instead of the 10-percent increase assumed in the 1979 Assessment and the Supplement. The increase in yields will be staged in the progress- 
ion 9, 7, 5, 3, and | percent per decade. 
3 The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by increasing the projected exports of 
lumber, plywood, and pulpwood (includes pulpwood and the pulpwood equivalent of pulp, paper, and board) by 20 percent in 1990, 40 percent in 2000, 60 
percent in 2010, 80 percent in 2020, and 100 percent in 2030. 
* The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by increasing the projected imports of ply- 
wood, pulpwood (includes pulpwood and the pulpwood equivalent of pulp, paper, and board), and hardwood lumber and logs by 20 percent in 1990, 40 percent 
in 2000, 60 percent in 2010, 80 percent in 2020, and 100 percent in 2030. 
> The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by reducing the projected area in timberland 
in the South by 2 million acres in 1990, 5 million acres in 2000, and 11 million acres in 2030. 
© The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by reducing the net annual growth on pine 
plantations, natural pine, and mixed pine—hardwood stands shown in the empiricalyield tables used in developing the base level projections by 25 percent. 
’ The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by reducing timber harvests on the national 
forests to 8.1 billion board feet in 1990 and maintaining this level through 2030. 
® The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by assuming that all the marginal cropland 
and pasture in the South that would yield higher rates of return in pine plantations would naturally revert to timberland by 2000 (70 percent natural pine, 30 
percent hardwoods in the Southeast; 40 percent natural pine, 60 percent hardwoods in the South Central). 
° The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by assuming that all the marginal crop! 
and pasture in the South would be planted in pine. 
'© The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by assuming that all the economic opportu- 
nities, except those involving intermediate stand treatment and those not involving area change and management types, for increasing timber supplies on timberland 
in private ownerships that yield 4 percent or more net of inflation or deflation would be utilized. 
'' The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by assuming that all the economic 
opportunities, except those involving intermediate stand treatment and those not involving area change and management types, for increasing timber 
supplies on timberland in private ownerships that yield 4 percent or more net of inflation or deflation would be utilized, and all the marginal cropland and pasture 
would be planted in pine. 
'2 The future as described by the basic assumptions and other specified and implied assumptions in chapter 3 modified by assuming that all the economic 
opportunities to increase timber supplies on forest industry timberlands in the Douglas-fir region would be utilized. 
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