204 



FORESTRY AND TIMBER 



Hardness of Common Commercial Woods 



Approximate time required to produce different wood crops ([]. S. Forest 



Service) 



Species 



Northern forests 



Aspen 



Beech ' 



Birch, paper 



Hemlock ' 



Maple, sugar ' 



Pine, reil 



Pine, white 



Central hardwood forests 



Chestnut * 



Oak. red 



Oak, white 



Poplar, yellow 



Farm timber plantations 



Catalpa * 



Larch, European * . . . . 



Mapl.'. silver* 



Wab.ut. black* 



Cottonwood * 



Southern forests 



Ash. white 



Cottonwood 



Cypress , 



(iuni, red , 



Pine, loblolly 



Pine, lonRleaf 



Pacific coast forests 



Fir, Douglas 



Hemlock, western 



I'ine, sugar 



Pine, western yellow . . . 

 Redwood 



Me. 



Mich. 



Me. 



Mich. 



Mich. 



Wis. 



N.Y. 



Md. 

 Ky. 

 Ky. 

 Tenn. 



III. 

 111. 

 111. 

 111. 

 Nebr. 



Ark. 



Miss. 



Md. 



S.C. 



S.C. 



S.C. 



Wash 



Wash 



Cal. 



Cal. 



Cal. 





OOQ,fc, K 



-1 ^ O O 



Years 

 30 



32 

 32 



20 

 25 

 35 



20 

 23 



25 



40 

 20 



25 



40 

 25 

 20 



Years 

 40 

 80 

 50 



100 

 90 

 40 

 40 



25 

 30 

 45 

 45 



25 

 35 



18 



30 

 15 



25 



35 

 50 

 50 

 35 

 25 



S u 



St 



Years 



60 

 100 



130 



55 

 55 



40 

 45 



80 



45 



65 

 30 

 40 

 75 



45 

 70 

 65 

 45 

 35 



rf < 



Years 



lb 



55 



75 



55 

 100 



50 



55 

 50 



2S 

 . s 



Years 

 200 



200 



100 



90 



85 

 100 

 160 

 110 



85 

 30 

 90 

 65 

 70 

 130 



75 



125 



100 



80 



70 



• Species tolerant of shade which should show better results in second growth. 



* Speciea grow lug under favorable conditions when measured. 



