30 



BULLETIN 544, U. S. DEPARTMENT OF AGRICULTURE. 



height. The succeeding second growth may pass through the same 

 stages, so that these stands may be relatively young. 



Table 4 gives height growth of selection stands in Maine, New 

 Hampshire, the Adirondacks, and West Virginia. It will be noted 

 that the heights in New Hampshire are below those in Maine and 

 New York, particularly in the larger diameters. This is undoubtedly 

 due to the fact that the New Hampshire data were collected toward 

 the southern edge of the White Mountain spruce forests, where the pre- 

 vailing conditions are less favorable to spruce than those farther 

 north. The values given for New York, on the other hand, are 

 doubtless somewhat high because of the exclusive use of dominant 

 trees as a basis for the height curve. The average height develop- 

 ment is slightly better in New Hampshire than in Maine and is 

 somewhat better in Maine than in New York for the same type or site. 



Table 4. — Height growth of spruce (based on diameter). 



















[CURVED. 



Diameter 

 breast 

 high. 



i 

 Maine. 1 New Hampshire. 2 



New York. 3 



West Virginia. 4 



Height. 



Basis. 



Height. 



Basis. 



Height. 



Basis. 



Height. 



Basis. 



Inches. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



19 



21 



21 



22 



23 



24 



25 



26 



27 



Feet. 

 12 

 IS 

 24 

 29 

 34 

 33 

 42 

 46 

 50 

 53 

 56 

 59 

 62 

 65 

 67 

 70 

 72 

 74 

 76 

 78 

 79 

 81 

 83 

 84 

 86 

 87 



Trees. 



Feet. 

 11 

 17 

 23 

 29 

 34 

 38 

 43 

 46 

 50 

 53 

 56 

 5S 

 61 

 63 

 65 

 67 

 63 

 69 

 71 

 72 

 72 

 73 

 7J 

 74 

 75 

 75 



Trees. 



Feet. 

 11 

 17 

 23 



29 

 34 



39 

 43 

 47 

 50 

 53 

 56 

 58 

 60 

 62 

 64 

 66 

 68 

 70 

 71 

 73 

 74 

 76 



Trees. 



Feet. 



10 



16 



22 



28 



34 



40 



46 



51 



56 



61 



66 



71 



75 



79 



82 



86 



89 



92 



95 



97 



100 



102 



104 



105 



107 



109 



110 



111 



112 



113 



114 



115 



116 



117 



Trees. 



















5 



3 



6 



8 



13 



17 



31 



21 



23 



19 



24 



13 



13 



13 



19 



5 



7 



5 



4 



4 



1 



1 











1 



6 



8 



24 



19 



55 



37 



29 



- 18 



23 



15 



5 



4 



2 



1 



1 

 3 

 1 

 5 



12 

 26 

 34 

 42 

 36 

 46 

 22 

 39 

 20 

 29 

 16 

 27 

 18 

 21 

 13 

 S 

 9 

 7 

 6 

 9 

 6 

 2 

 2 



21 

 36 

 76 

 75 

 87 

 76 

 87 

 54 

 68 

 33 

 36 

 24 

 21 

 13 

 9 

 3 

 3 



1 

 1 















3 













2S 















20 















30 















31 















32 















33... 















1 

 1 



34 



























260 





725 





2 





462 











1 Spruce slope 1 ype. Data collected by R. S. Hosmer. 



2 Spruce slop< i ie Data collected by T. S. Woolsey,jr. 



* oprucesiop i ie. uaiacoj [eanyi.es. \\ ooiscy, jr. 



* Spruce hardwood type (dominant trees only). From data collected by the Conservation Commission 

 I 



* Spruce siopo type. Data collected by John Foley. 



In the even-aged, second-growth forests, the individual tree is not 

 subjected to long or varied periods of suppression. All of the trees 



