A NATIONAL PLAN FOE AMERICAN FORESTRY 945 



CONDITION OF TYPICAL STANDS, AND MEASURES THAT WILL BUILD UP 



THEIR PRODUCTIVITY 



Investigations of timber growth, surveys of forest conditions in 

 individual counties, and the general forest survey now under way 

 under the direction of the Southern Forest Experiment Station are 

 beginning to yield definite detailed information as to the condition of 

 individual stands. Four cases will be cited. 



(1) Average-stocked shortleaf and loblolly pine with hardwoods. It is 

 believed that the problem of building up the stands is simpler with 

 shortleaf and loblolly pine than with longleaf pine, which will be 

 discussed later. It is probable, also, that the total volume per acre of 

 selection forests of these species would normally exceed that of long- 

 leaf. Figure 14, diagram A, and table 14 show conditions in certain 

 stands of this type in southern Arkansas. The acre averages are 

 based on an inventory of 345,000 acres of average-stocked stands in 

 the shortleaf-loblolly-hardwood type and are estimated (25) to be 

 typical of conditions on 7 million acres of this type. This area com- 

 prises some of the most productive forests of this type and cannot be 

 taken as typical of larger areas of the type. 



