CONTEXTS XI 



CHAPTER III.— Continued 



An example of potentials for increasing supplies of softwood sawtimber 



in the United States. — Continued Page 



Summary of potentials for intensification of management 105 



General comparison of alternatives studied 105 



Additional management opportunities 106 



An example of opportunities for intensifying forest management in 



the Southeast 106 



Identifying areas suitable for intensified management 107 



Estimated increases in yields 108 



Costs of forestry practices 110 



Values of increased harvests 110 



Areas suitable for treatment 110 



Rates of return on investments 111 



An example of potentials for intensified forest management in the 



Northeast region 112 



Designation of management classes 112 



Projecting stand development 113 



Regional expansion of the oak-hickory pilot study 114 



Maple-beech-birch pilot study 115 



An example of potentials for intensified forest management in the 



North Central region 116 



Selection of areas for analysis of treatments 116 



Yields, prices, and costs 117 



Regional estimates of management opportunities at 1970 prices, 1 17 



Regional estimates of opportunities at higher prices 117 



Limitations of current study 120 



An example of intensified management potentials in Washington, 



Oregon, and California 120 



Area classification 120 



Management practices considered 121 



Yield assumptions 121 



Cost assumptions 121 



Price assumptions 121 



Economic analysis 121 



Intensification potentials with 1970 prices 122 



Management potentials with rising prices 122 



Potential increases in timber supply from improved utilization 123 



Assumed improvements in utilization in base projections 123 



Additional opportunities for improved utilization 124 



Projection alternatives 125 



CHAPTER IV. AVAILABILITY OF WORLD TIMBER 



RESOURCES. _. _ 126 



Trends in U.S. imports of timber products 126 



Trends in U.S. exports of timber products 127 



Trends in U.S. net imports of timber products 128 



World timber demands. 129 



The situation in Europe 129 



The situation in Japan 131 



The situation in other countries and regions 132 



World forest land and timber resources 132 



Forest areas 132 



Timber volumes 133 



Timber production 133 



Timber supply potential 133 



Potential timber supplies from Canada 134 



Forest resources 134 



Production trends 134 



Production potentials 135 



Utilization trends 137 



Exports to the United States 137 



