APPENDIX CRITERIA FOR RATING PRODUCTIVITY 



679 



STANDARDS FOR THE NEW ENG- 

 LAND AND MIDDLE ATLANTIC 

 REGIONS 



Forest Type Groups 



The following forest type groups were recog- 

 nized: 



Spruce-fir 



White-red-jack pine 



Maple-beech-birch 



Oak-hickory (including yel- 

 low-poplar and bottom- 

 land species) 



Loblolly-shortleaf pine (in- 

 cluding pitch, Virginia, 

 and other yellow pines) 



Oak-pine 



Species Classification 



The classification of species for the various 

 forest type groups is shown in table 88. 



Existing Stocking 



Standards for rating existing stocking are given 

 in table 89. 



Table 89. — Trees required per acre Jor full stocking, 

 by tree size and forest type group, ^ New England 

 and Middle Atlantic Regions 



Diameter 



breast 



high 



(inches) 



Spruce- 

 fir 



White 

 pine 2 



Maple- 

 beech- 

 birch 



Oak- 

 hickory, 

 oak-pine, 



and 

 loblolly- 

 shortleaf 



pine 



Reproduction 



2 _ -- 



Number 

 1,000 

 800 

 600 

 560 

 330 



210 

 150 

 120 

 100 

 80 



Number 

 1,000 

 800 

 600 

 560 

 330 



210 

 150 

 115 



85 

 70 



55 

 46 

 40 



Number 

 1,000 

 800 

 600 

 460 

 250 



175 



110 



90 



70 



60 



50 

 40 

 36 



Number 

 1, 000 

 800 



4 . 



600 



6- - -- 



400 



8 



240 



10 



155 



12 



115 



14. _-_ 



90 



16 - - - 



72 



18 



60 



20 



51 



22 





42 



24 _ _ 





36 



' For convenience in field application, stocking standards 

 for these and all other eastern types were reconstructed in 

 the form illustrated by table 85. 



2 Of the' white-red-jack pine type group. 



Prospective Stocking 



Seed source standards for coniferous species 

 were as follows: 



Pines required per acre to rate 100 

 percent for seed-tree requirements ' 



White pine Loblolly -shortleaf- 



type, light pine and oak- 



1-. , , /. ■ N soils pine type groups 



D. b. h. (inches) : (number) (number) 



6 __ 30 



8 ._ 20 



10 15 17 



12 12 13 



14 9 10 



1&+ 6 7 



■ For convenience in field application, seed-tree standards 

 for these and all other eastern types where applicable were 

 reconstructed in the form illustrated in table 86. 



standards for determining 

 prospective stocking, based 

 on proximity to seed source 



Distance from Stocking 



seed source expected 



(chains) (percent) 



f - 5 100 



a fi ■ 5. 1-10 60 



Spruce-fir type group < jq ^20 20 



[ 20+ 



0-2 100 



2. 1- 4 75 



White pine type (light soils) { 4. 1-6 50 



6. 1- 8 10 



8+ 



0-2 100 



Oak-pine and loblolly-shortleaf pine I 2. 1- 6 75 



type groups < 6. 1- 8 50 



8. 1-10 10 



10+ 



Spruce- Fir Type Group 



Credit for prospective stocking was given only 

 if the area was cut less than four growing seasons 

 prior to the examination. Isolated individual 

 trees were not recognized as seed sources. Only 

 residual stands or protected groups or strips of 

 trees containing at least 25 percent spruce or fir 

 trees of seed-bearing character were considered to 

 be seed sources. If seed source was a residual 

 stand, at least 15 spruce or fir seed trees per acre 

 were required. 



The standards used for classifying prospective 

 stocking based on proximity to the margin of a 

 group, strip, or stand of seed-bearing trees are 

 given in the preceding tabulations. 



White Pine Type 



(1) Heavy soils {natural hardwood sites). Pi*o- 

 spective stocking was not considered on heavy 

 soils. Unless reproduction of desirable species 

 was present before removal of the final overstory, 

 establishment subsequent to cutting was con- 

 sidered problematical. Availability of white pine 

 seed sources on cutover areas on such sites is 

 believed to have doubtful influence on the repro- 

 duction established after cutting. 



(2) Light soils {natural pine sites). Prospective 

 stocking was considered only if the area was cut 



/ 



