674 



TIMBER RESOURCES FOR AMERICA'S FUTURE 



Existing Stocking 



Crop trees recorded on the Koo-acre plot: 



Desirable species — 1 tree 4 inches d. b. h. 



Acceptable species — 2 trees 2 inches d. b. h. 

 Crop trees recorded on the concentric %-a.cTe plot : 



Desirable species — 3 trees 6 inches d. b. h. 



Acceptable species — 2 trees 8 inches d. b. h. 

 1 tree 12 inches d. b. h. 



These trees were tallied in the columns headed 

 "No." (see upper left block of fig. 4). The 

 stocking percentages shown there were taken from 

 a stocking table (table 85) prepared for field use 

 from the basic standards given in table 101. 

 (Similar tables were prepared for all types and in 

 some cases by sites (Central States hardwoods) 

 based on the standards of number of trees of 

 various sizes needed to rate 100-percent stocking.) 

 The stocking percentages were then totaled. 

 Results: 21 percent for "desirable" species and 33 

 percent for "acceptable" species. The total 

 existing stocking estimate was thus 54 percent. 



In other words, 54 percent of the area was esti- 

 mated to be occupied b}^ crop trees of "desirable" 

 and "acceptable" species. 



Existing Stocking Modified by 



Composition 



Since less than 50 percent of existing stocking 

 was composed of "desirable" species, an adjust- 

 ment was made by use of a composition factor, 

 calculated by the following formula: 



Composition factor = 



existing desirable stocking % 

 .5 X existing total stocking % 

 21 



Example : 



C. F.= 



C. F.= 



.5X54 

 21 



27" 



.78 



Therefore, the estimate for existing stocking was 

 reduced by applying the factor 0.78. The ad- 

 justed estimate for existing stocking was then 

 78% X 54% = 42%. 



Table 85. — Crop tree stocking standards for the South Atlantic, Southeast, and West Gulf Regions, by 



diameter class 







H 



DO-ACRE PLOT (RADIUS PLOT 11.8 FT.) 















Stocking percent when number of trees on plot is — 



Number 



Diameter breast high 

 (inches) 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



20 



of trees 

 per acre 

 for 100- 

 percent 

 stocking 



Reproduction . . - 



10 

 12 

 17 



20 

 25 

 34 



30 

 38 

 51 



40 

 50 



68 



50 

 62 



85 



60 



75 



100 



70 

 88 



80 

 100 



90 



100 





1,000 



2. 



800 



4 









590 

















H-ACRE PLOT (RADIUS 52.7 FT.) 



6 - . ... 



1 

 2 

 3 



4 

 6 



7 



8 

 10 

 12 



14 

 16 

 19 



21 

 24 

 26 



29 

 33 



2 



4 

 6 



9 

 11 

 14 



17 

 20 

 24 



28 

 32 

 37 



42 



48 

 53 



59 



67 



4 



6 



10 



13 

 17 

 21 



25 

 29 

 36 



42 

 48 

 56 



62 

 71 



79 



88 

 100 



5 



8 



13 



17 

 22 



28 



33 

 39 

 48 



56 

 65 

 74 



83 



95 



100 



6 

 10 

 16 



22 

 28 

 35 



42 

 49 

 60 



69 

 81 

 93 



100 



7 

 12 

 19 



26 

 33 

 42 



50 

 59 

 71 



83 



97 



100 



9 

 15 

 23 



30 

 39 

 49 



58 

 69 

 83 



97 

 100 



10 



17 

 26 



35 

 44 

 56 



67 

 78 

 95 



100 



11 



19 

 29 



39 

 50 

 62 



75 



88 



100 



12 

 21 

 32 



44 

 56 

 69 



83 

 98 



25 

 42 

 65 



87 



400 



8 



240 



10 ... . 



155 



12 



115 



14 . 



90 



16 .... 



72 



18 



60 



20 



51 



22 



42 



24 







36 



26 









31 



28 











27 



30 













24 



32 















21 



34 

















19 



36 

















17 



38 



















15 























