692 



i 



TEVIBER RESOURCES FOR AMERICA'S FUTURE 



and saplings to conventional 

 stocked-quadrat method: 



measures bv the 



Entries from table lOi 



Maximum 

 distance 

 Minimum trees per acre from point 

 (n umber) {feet) 



1,000 3.7 



750 7.4 



500 :_ 7.4 



250 .: 7.4 



Equivalent minimum of trees per 



quadrat required for a stocked point 



(number) 



1 per l-milacre quadrat. 

 3 per 4-milacre quadrat. 



2 per 4-milacre quadrat. 

 1 per 4-milacre quadrat. 



An interpretation of the entries in table 104 

 can be illustrated by (1) observing that the entries 

 for established seedlings under 6 inches tall in the 

 western white pine type show a minimum of 500 

 trees per acre and a point distance of 7.4 feet; (2) 

 reference of these entries to the tabulation above 

 shows that at least 2 established seedlings less 

 than 6 inches tall must be present on a 4-milacre 

 quadrat (circular plot having a 7.4-foot radius) 

 before the observation point (or center of the 

 quadrat) is considered stocked. 



The standards of table 104 were applied in Cali- 

 fornia with the following adaptations or additions: 



1. For the Douglas-fir type group, existing stock- 

 ing of seedlings, saplings, and small poles was de- 

 termined by the following: 



Size class of tree: 



Less than 6 inches high 



6 inches high to 9 inches d. b. 



Maximum 

 Minimum distance 

 trees per acre from point 

 (number) (feet) 



500 7. 4 



250 7. 4 



2. For the ponderosa pine type group east of the 

 Sierra summit, the standards of table 104 for Site 

 Index 80 were applied. 



3. For the ponderosa pine, western white (and 

 sugar) pine, and fir-spruce type groups west of the 

 Sierra summit, the standards in table 104 for the 

 w^estern white pine were applied. 



4. Table 105 presents the standards for the red- 

 w^ood type group. 



In Coastal Alaska, the standards used for hem- 

 lock-Sitka spruce were identical to those used for 

 the corresponding tvpe group in the Pacific North- 

 west (table 104). 



Prospective Stocking 



Douglas- Fir and Other Type Groups 



West of the Cascade Summit in the 



Pacific Northwest 



The standards for prospective stocking discussed 

 here were applied to the Douglas-fir, fir-spruce, 



Table 104. — Minirnum number of trees per acre and maximum distance from observation point used in classifying existing 

 stocking in the Pacific Northwest Region, by forest type group and site index 





Douglas- 

 hemlock -s 



fir, larch, 

 nruce. fir- 



Ponderosa pine 



Western white 

 pine 



Lodgep 



ole pine 



Age or size of established 



spruce, and hard- 

 woods 



Site index 60 



Site index 80 



Site index 100 





seedling and crop tree d. b. h. 



Trees 

 per 

 acre 



Maxi- 

 mum 

 distance 

 from 

 point 



Trees 

 per 

 acre 



Maxi- 

 mum 

 distance 

 from 

 point 



Trees 

 per 

 acre 



Maxi- 

 mum 

 distance 

 from 

 point 



Trees 

 per 

 acre 



Maxi- 

 mum 

 distance 

 from 

 point 



Trees 

 per 

 acre 



Maxi- 

 mum 

 distance 

 from 

 point 



Trees 

 per 

 acre 



Maxi- 

 mum 

 distance 

 from 

 point 



Under 2 years. .. 



Number 

 750 

 250 



Feet 

 7.4 

 7.4 



Number 



Feet 



Number 



Feet 



Number 



Feet 



Number 



Feet 



Number 



Feet 



2yrs. to 9 in. d. b. h 























4 in. high to 5 in. d. b. h 



















1,000 



'3.7 



Under 6 in. high . 







■566 

 250 



7.4 

 7.4 



500 

 250 



7.4 

 7.4 



500 

 250 



It 



500 



7.4 





6 in. high to 8 in. d. b. h 











6 in. high to 10 in. d. b. h 



250 



7.4 







6 in. d. b. h 



















653 

 479 

 367 

 290 

 235 

 163 



120 

 92 

 72 

 59 



4.6 



7-.. 























5.4 



8 























6.2 



9 







190 

 154 

 107 



79 

 60 

 48 

 39 

 32 



27 

 23 

 20 

 17 



15 



13 

 12 

 U 

 10 



7 



8.5 

 9.5 

 11.4 



13.3 

 15.2 

 17.1 

 19 

 20.9 



22.8 

 24.7 

 26.6 

 28.5 

 30.4 



32.2 

 34.1 

 36.1 

 38 

 44.6 



215 

 174 

 121 



89 

 68 

 54 

 44 

 36 



30 

 26 

 22 

 19 

 17 



15 

 13 

 12 

 11 



8 



8.0 

 8.9 

 10.7 



12.5 

 14.3 

 16 1 

 17.8 

 19.6 



21.5 

 23.1 

 25.1 

 27.0 

 28.6 



30.8 

 32 6 

 34.0 

 35.5 

 41.6 



250 

 209 

 145 



107 

 82 

 64 

 52 

 43 



36 

 31 

 27 

 23 

 20 



18 

 16 

 14 

 13 

 9 



7.4 

 8.1 

 9.7 



11.4 

 13 

 14.7 

 16.3 

 17.9 



19.5 

 21.2 

 22.8 

 24.4 

 26.1 



27.7 

 29.3 

 31.0 

 32.6 

 38 2 







6.9 



10 _ 



223 

 168 



133 



108 

 90 

 76 



8.0 

 9.2 



10.3 

 11.4 

 12.5 

 13.6 







7.7 



12 ._ 



166 



122 

 93 

 74 

 60 

 41 



30 

 23 

 18 

 11 



9 



11 

 12 

 14 

 15 

 18 



21 

 25 

 28 

 31 



9.2 



14 



10.8 



16._.. 



12.3 



18 



13.8 



20... .. 



15.3 



22 





24 



58 



15.6 







26.. 







28 



46 



17.5 







30 . 







32.... 



36 



19.2 







34... 











36 



30 



20.8 











38 











40.. 



25 



22.0 











42-)-... 

























' Overstocking was considered the equivalent of nonstockine under the 

 following conditions: (a) 20 or more seedlings 4 inches to 12 inches high per 



milaere: (b) 10 or more trees 12 inches tall to 1 inch d. b. h. per milacre 

 quadrat. 



