T.^BLE 14. — .Yet annual growth, hy species, of all grouping slock, saw- 

 timber, arid poletimber on commercial forest land, Minnesota, 7953 



Species 



Softwoods; 



White pine 



Red pine 



Jack pine 



Black spruce 



\\'hite spruce 



Balsam fir 



Tamarack 



Cedar 



Total.. 



Hardwoods: 



Sugar maple 



Soft maples 



Yellow birch 



Basswood 



Elm 



Red oaks 



White oak 



Other white oaks 



.Aspen 



Balsam poplar 



Cottonwood 



Paper birch 



.Ash 



Other hardwoods 



Total 



All species 



All growing 

 stock 



Million 

 cu. ft. 



6.9 



8.2 

 15.1 

 22.8 



4.9 

 37.7 

 13.3 



8.7 



117.6 



5.9 



1.3 



.3 



13.2 



11.7 



17.1 



2.0 



9.5 



147.0 



11.8 



.7 



24.7 



15.4 



6.4 



267.0 



384.6 



Sawtimber 



Million 

 bd.-ft. 

 30.2 

 37.2 

 83.9 

 37.7 

 19.9 

 78.2 

 22.3 

 19.3 



328.7 



9.S 



.8 



1.2 



41.7 



47.1 

 58.4 



8.1 



30.3 



170.4 



18.5 



3.0 

 23.7 

 36.0 

 10.7 



459.4 



788.1 



Polctimber 



Thousand 



cords 



-0.1 



-4.6 



-62.9 



171.3 



4.5 



236.3 



99.4 



51.1 



495.0 



46.8 



14.4 



. 5 



47.4 



17.2 



53.2 



2.9 



35.2 



1,357.9 



96.8 



1.0 



241.5 



94.0 



50.4 



2,059.2 



2,554.2 



T.ABLE 15. — .Xet annual growth of sawtimber and all growing stock 

 on commercial forest land, by species group and geographic division, 

 Minnesota, 1953 





Total 



Division 



Species group 



North- 

 eastern 



South- 

 eastern 



Western 



Growing stock: 

 Softwoods . - 



Million 



cu. ft. 



117.6 



158.8 



108.2 



Million 



cu.ft. 



114.7 



138.9 



58.2 



Million 



cu.ft. 



1.2 



9.0 



37.8 



Million 

 cu.ft. 

 1 7 





10 9 





12.2 







Total 



384.6 



311.8 



48.0 



24.8 







Sawtimber: 



Million 



bd.-ft. 



328.7 



188.9 



270.5 



Million 



bd.-ft. 



317.6 



163.5 



99.5 



Million 



bd.-ft. 



5.0 



12.3 



123.6 



Million 

 bd.-ft. 

 6 1 



Aspen'.. 



13. 1 





47.4 







Total 



7SS. 1 



580.6 



140.9 



66.6 



1 Includes balsam poplar but not cottonwood. 



Rate Has Increased Since 1936 



Annual growth in terms of total growing stock in- 

 creased from 278 million cubic feet in 1936 to 384.6 



million cubic feet in 1953, an increase of 38 percent. 

 Sawtimber growth increased 84 percent. The increase 

 in total volume was greater in hardwoods than in soft- 

 woods (table 16 and fig. 21). 



Table 16. — Comparison of 7936 and 7953 annual net growth of 

 sawtimber and growing stock, by species group, Minnesota 



Species group 



All growing stock 



Sawtimber 





1936 



1953 



1936 



1953 



Softwoods.. 



Million 



cu.ft. 



99.0 



102.1 



76.9 



Million 



cu.ft. 



117.6 



158.8 



108.2 



Million 

 bd.-ft. 

 191.0 

 112.9 

 125.1 



Million 

 bd.-ft. 

 328.7 





188.9 



Other hardwoods _ 



270.5 







Total, all species 



278.0 



384.6 



429.0 



788.1 







' Includes balsam poplar but not cottonwood. 



Further Large Increases Possible 



Minnesota forest lands are capable of growing vastly 

 more timber than is now being produced. Possible 

 timber volumes and growth rates attainable in 1965 

 and 1975 are shown in table 17. 



Table 17. — Minnesota's potential timber volume and net growth in 

 7965 and 7975 under certain assumptions as to increases in future 

 timber requirements and continuing progress in forestry 



Class of material and 



Timber volume 



Annual net growth 



species group 



1953 



1965 



1975 



1953 



1965 



1975 



All growing stock: 



Softwoods 



Hardwoods 



Million 

 cu.ft. 

 2,829 

 4,406 



Million 

 cu. ft. 

 3,550 

 5,832 



Million 

 cu. ft. 

 4,200 

 6,978 



Million 

 cu. ft. 

 117.6 

 267.0 



Million 

 cu.ft. 

 136.3 

 303.5 



Million 

 cu. ft. 

 153.9 

 327.9 







Total 



7,235 



9,382 



11,178 



384.6 



439.8 



481.8 







Sawtimber only: 



Million 

 bd.-ft. 

 5,039 

 7,499 



Million 

 bd.-ft. 

 6,934 



10,085 



Million 



bd.-ft. 



8,875 



12,428 



Million 

 bd.-ft. 

 328.7 

 459.4 



Million 

 bd.-ft. 

 391.2 

 546.9 



Million 

 bd.-ft. 

 450.0 



Hardwoods . . 



617.0 







Total 



12,538 



17,019 



21,303 



788.1 



938.1 



1,067.0 



1 The outlook for timber volumes and net annual growth in 1965 and 1975 is 

 based on assumptions that the annual timber products output in the United States 

 and Minnesota will rise with estimated increases in population, national income 

 and the position of wood in the national economy. Also, that forestry will 

 continue to progress at the rate indicated by recent trends, including advancej 

 in protection, management, and reforestation. These projections were developed 

 from trends for the entire Lake States as prepared for the upper level of future 

 timber requirements shown in the preliminary review draft of the Timber 

 Resource Review. These trends are predicated upon anticipated future timber- 

 product demands on the Lake States forests, a continuing pattern of reforesta- 

 tion of denuded lands, a "thickening up" of natural stands, and other changes 

 leading to a more productive forest resource. 



Naturally such projections are speculative not only because of uncertainty 

 as to management practices of landowners, uncertainty as to future utilization, 

 but also because of still incomplete knowledge of forest type behavior under all 

 kinds of treatment. Much of the Lake States forest area is covered by tem- 

 porary and changing forest types whose future composition cannot yet be 

 accurately foretold. 



Minnesota's Forest Resources 



19 



