34 BULLETIN 544, U. S. DEPARTMENT OF AC4RICULTITRE. 



Table 9. — Diameter growth ofspmce in Maine, by types.'' 

 [Based on the last 20 years.] 



[CURVED.] 





Lower spruce 

 and hardwood 

 land, 564 trees. 



Upper spruce 

 and hardwood 

 land, 379 trees. 



Lower spruce 

 slope, 144 trees. 



Upper spruce 

 slope, 87 trees. 



Average of all 



types, 1,174 



trees. 



Diameter breast 

 high. 



Peri- 

 odic 

 annual 

 growth. 



Time 



re- 

 quired 

 to grow 

 1 inch. 



Peri- 

 odic 

 annual 

 growth. 



Time 



re- 

 quired 



to grow 

 linch. 



Peri- 

 odic 

 annual 

 growth. 



Time 



re- 

 quired 

 to grow 

 1 inch. 



Peri- 

 odic 

 annual 



growth. 



Time 



re- 

 quired 

 to grow 

 linch. 



Peri- 

 odic 

 annual 

 growth. 



Time 



re- 

 quired 

 to grow 

 1 inch. 



Inches. 



Inches. 

 0.036 

 .048 

 .063 

 .080 

 .098 

 .114 

 .126 

 .136 

 .142 

 .146 

 .148 

 .150 

 .148 

 .146 

 .142 

 .138 



Years. 

 28 

 21 

 16 

 13 

 10 

 9 

 8 

 7 

 7 

 7 

 7 

 7 

 7 

 7 

 7 

 7 



Inches. 



0.054 

 .003 

 .071 

 .078 

 .085 

 .091 

 .096 

 .102 

 .109 

 .112 

 .112 

 .109 

 .106 

 .106 

 .106 

 .106 



Years. 

 19 

 16 

 14 

 13 

 12 

 11 

 10 

 10 

 9 

 9 

 9 

 9 

 9 

 9 

 9 

 9 



Inches. 

 0.015 

 .022 

 .032 

 .046 

 .067 

 .093 

 .113 

 .124 

 .127 

 .126 

 .122 

 .116 

 .110 

 .103 

 .096 

 .091 



Years. 



67 



45 



31 



22 



15 



11 



9 



8 



8 



8 



8 



9 



9 



10 



10 



11 



Inches. 

 0.026 

 .030 

 .034 

 .038 

 .041 

 .044 

 .047 

 .049 

 .052 

 .055 

 .058 

 .060 

 .062 

 .062 

 .062 

 .OCO 



Years. 

 38 

 33 

 29 

 26 

 24 

 23 

 21 

 20 

 19 

 18 

 17 

 17 

 16 

 16 

 16 

 17 



Inches. 

 0.034 

 .045 

 .056 

 .068 

 .081 

 .093 

 .105 

 .115 

 .122 

 .126 

 .129 

 .130 

 .129 

 .120 

 .122 

 .116 



Years. 

 29 







22 



7 



18 



8 



15 



9 



12 



10 



11 



11 



10 



12 



9 



13 



8 



14 



S 



15 



8 



16 



8 



17 



8 



18 



S 



19 



8 



20 



9 







Average 



.141 



7 



.104 



10 



.112 



9 



.052 



19 



.119 



8 



1 From data secured by R. S. Hosmer, 1902, on partially culled land in Squaw Mountain Township, 

 Me., and including trees of all crown classes. 



Table 10. — Diameter growth of spruce in New York. 1 



[All types, spruce-hardwood type chiefly; dominant trees only.l [curved.] 



Diameter 

 breast 

 high. 



Absolute maxi- 

 mum. 



Average maximum. 



Average. 



Basis. 



Periodic 

 annual 

 growth. 



Time 

 required 

 to grow 



linch. 



Periodic 

 annual 

 growth. 



Time 

 required 

 to grow 



linch. 



Periodic 

 annual 

 growth. 



Time 



req uired 

 to grow 

 linch. 



Inches. 



21 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



Inches. 

 0.176 

 .218 

 .253 

 .2S2 

 .309 

 .324 

 .331 

 .328 

 .317 

 .297 

 .270 

 .245 

 .216 

 .187 

 .156 

 .132 

 .110 



Years. 

 5.7 

 4.6 

 4.0 

 3.5 

 3.2 

 3.1 

 3.0 

 3.0 

 3.2 

 3.4 

 3.7 

 4.1 

 4.6 

 5.3 

 6.4 

 7.6 

 9.1 



Inches. 

 0.111 

 .140 

 .164 

 .186 

 .205 

 .217 

 .223 

 .223 

 .219 

 .210 

 .197 

 .184 

 .168 

 .150 

 .128 

 .110 

 .093 



Years. 

 9.0 

 7.1 

 6.1 

 5.4 

 4.9 

 4.6 

 4.5 

 4.5 

 4.6 

 4.8 

 5.1 

 5.4 

 6.0 

 6.7 

 7.8 

 9.1 

 10.8 



Inches. 

 0.046 

 .061 

 .075 

 .089 

 .101 

 .110 

 .115 

 .118 

 .121 

 .124 

 .124 

 .123 

 .119 

 .112 

 .101 

 .089 

 .076 

 .064 

 .051 



Years. 

 21.7 

 16.4 

 13.3 

 11.2 

 9.9 

 9.1 

 8.7 

 8.5 

 8.3 

 8.1 

 8.1 

 8.1 

 8.4 

 8.9 

 9.9 

 11.2 

 13.2 

 15. (i 

 19.6 



Trees. 









10 ! 

 42 

 32 : 



57 

 4G 

 65 

 44 

 27 

 19 

 25 

 15 



4 



4 



2 



1 



19 











20 



























393 



1 From data collected by the Conservation Commission of New York in 1912 on culled land in Essex and 

 Herkimer Counties. 



2 The time required to grow to a diameter of 1 inch at breastheight was 11 years for " absolute max- 

 imum" growth conditions, 17 years for "average maximum," and 36 years for "average." 



