Establishment and reinforcement of timber stand — The acreage is made up 

 of three components. First, land expected to shift to forest and woodland 

 from other uses by 1975 except for the acreage which needs trees to check 

 erosion and the acreage of shelterbelts and windbrealcs. Secondly, land 

 classified as forest and woodland in 1958 but which was less than 10 per- 

 cent stocked, or stocked with ;.:. satisfactory species. Thirdly, land in 

 forest and woodland in 1958 more than 10 percent stocked which needed re- 

 inforcement. Ordinarily this did not include any acreage stocked to /fi 

 percent or more. The acreage estimates includes only the proportionate 

 part of the acreage needing reinforcement. For example, if a total area 

 of 100,000 acres needed reinforcement but it was estimated that the plant- 

 ing needed to accomplish this would be equal to only 40,000 acres of full- 

 scale establishment, the 40,000 acres was the amount included in the 

 estimate. 



Improvement of timber stand — The Inventory shows that approximately 

 2 million acres of forest land on which stand-improvement measures are 

 recommended as feasible under good forest management. Estimates were 

 limited to acreages and timber types expected to return the costs of 

 improvement investment. 



Protection of timber stand from ; 



Fire — The acreage of forest land which in 1958 was not receiving 

 protection adequate to meet the fire situation in the worst years 

 and under critical conditions amounts to about 5.4 million acres. 



Insects and disease — The acreage of forest land not included in 

 1958 in an effective program of protection from insect and disease 

 outbreaks is shown by the Inventory to amount to about 4.7 million 

 acres. 



Animals, including rodents — The acreage of forest land which in 

 1958 was not receiving adequate protection from animals, including 

 rodents, and on which protection is considered feasible and practi- 

 cal under good forest management. This estimate of about 1.5 million 

 acres includes the need for protection from domestic animals. 



Erosion control ~ There are about 232 thousand acres of Forest and 

 Woodland that is expected to be planted to trees to halt erosion 

 plus the acreage of forest land on which erosion and water-disposal 

 measures are needed to check gullies, control sheet erosion, stabi- 

 lize dunes and blow-outs, contain slide or slide areas, and control 

 logging road and skid trail erosion. 



Establishment of shelterbelts and windbreaks — There are about 24 

 thousand acres on which windbreaks and shelterbelts to influence 

 wind currents and thus reduce soil blowing, control snowdrifting, 

 conserve moisture, and protect buildings, fields, gardens, and feed 

 lots are feasible. 



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