CONTENTS 



CHAPTER II.— Continued Page 



Forest area assumptions for projections 43 



A base projection of timber supplies with 1970 levels of 



management 44 



General procedures — _ 44 



Timber harvesting assumptions for base projections 44 



Summary of base projections of supplies for the United States 46 



Trends in timber removals 47 



Net growth and mortality 48 



Supplies of roundwood products 49 



Timber inventories 52 



Projections of timber supplies in the South 52 



Trends in forest area 53 



Timber removals 54 



Supplies of roundwood products 56 



Removals in relation to net growth 59 



Trends in net growth per acre 59 



Trends in timber inventories 61 



Projections of timber supplies in the North 61 



Trends in forest area 61 



Timber removals and net growth 61 



Supplies of roundwood products 64 



Trends in net growth per acre 66 



Trends in timber inventories 69 



Projections of timber supplies in the Rocky Mountains 69 



Trends in forest area 70 



Timber removals 71 



Supplies of roundwood 73 



Net growth and mortality 76 



Trends in timber inventories 77 



Projections of timber supplies in the Pacific Coast section 77 



Trends in forest area 77 



Timber removals 79 



Supplies of roundwood products 81 



Net growth in relation to removals 84 



Trends in inventory volumes 86 



Economic projections of supply with 1970 levels of management. __ 87 



Recent supply-price relationships for timber products 88 



Projected supplies from National Forests 90 



Projected supplies from other lands 91 



Projected supplies from all ownerships 92 



CHAPTER III. OPPORTUNITIES FOR INCREASING TIMBER 

 SUPPLIES THROUGH INTENSIFIED MANAGEMENT AND 



UTILIZATION 93 



General opportunities for management intensification 94 



The role of research 96 



The importance of forest ownership 96 



Environmental factors relating to intensification of forest manage- 

 ment 98 



An example of potentials for increasing supplies of softwood saw- 

 timber in the United States 99 



Area classification 100 



Selection of areas for analyses of management alternatives 100 



Costs of intensified management 101 



Yields from intensified management 101 



Values of increased yields 101 



Ranking opportunities 102 



Increased yields from farm and miscellaneous private lands. _ 102 



Increased yields from National Forest lands 103 



Sensitivity to price assumptions 104 



Possible succession of treatment programs 105 



