24 BULLETIN" 418, U. S. DEPARTMENT OF AGRICULTURE. 



and at the center of old ones, but narrow in the exterior rims of old 

 trees, sometimes 90 to an inch of radius. 



Yellow pine is a long-hved tree. The oldest encountered in the 

 analysis of 4,997 stumps in eastern and central Oregon was in its 

 six hundred and eighty-seventh year when cut for lumber. 



DIAMETER AND HEIGHT GROWTH. 



In Tables 9 and 10 the rate of growth of yellow pine, both in height 

 and diameter, is given for a number of typical locaUties in the central 

 and eastern parts of the State. These measurements are the result 

 of detailed study and analysis by the Forest Service of 4,997 felled 

 trees ^ in 20 dijfferent locaUties. The wide variation in the rate of 

 growth in the several regions should not be interpreted to indicate 

 necessarily the superiority of one region over another, but rather 

 the effect of local variations in soil, exposure, or climate upon the 

 rate of growth. In some regions of the State the data were taken 

 in very favorable, well-watered situations, while in other regions 

 it chanced that the data were collected in unfavorable situations.^ 



1 In 1910 and 1911. 



2 In order that the growth in these several localities maybe compared intelligently, the following brief 

 description of the conditions on each is given: 



1. Austin, Whitney, Grant, and Baker Counties: Practically pure stands on rather dry, rolling hills 

 at altitudes of from 4,500 to 4,800 feet. Soil: Loamy, decomposed lava, not deep. 



2. Looldngglass Creek, Union County: Stands with about 5 per cent of other species, growing in coves 

 and on gentle slopes at an altitude of 3,200 feet. Climate: More humid than is usual at that elevation in 

 the Blue Mountains. Soil: Good, deep, loamy, decomposed lava. 



3. Parker's Mill, Morrow County: Pure yellow-pine stand near foot of gentle south slope. Altitude: 

 3,500 feet. Soil: Fairly deep, loamy, decomposed lava. 



4. Winlock's Mill, Wheeler County: Pure yellow-pine stand on hot, dry, south slope. Altitude: About 

 3,300 feet. Soil: Fairly deep, loamy, decomposed lava, very dry in summer. 



5. Ochoco Creek, Crook County: Pure yellow-pine stand on all slopes of rolling country, near lower alti- 

 tudinallimits of forest. Altitude: About 3,000 feet. Soil: Loamy, decomposed lava, very dry in summer 



6. Mill Creek, Crook County: Stands with 10 per cent or so of other species on a rolling plateau at alti- 

 tude of 3,500 feet. Soil: Loamy, decomposed lava of good depth, not excessively dry. 



7. Tamarack Creek, Wasco County: Stands averaging at least 10 per cent of other species, growing on 

 steep slopes on both sides of the creek. The soil is loamy and the moisture conditions better than average 



8. Metolius Creek, Crook County: Stands with about 5 per cent of other species on fairly level ground: 

 where moisture conditions are good (for east of the Cascades) and the soil deep and loamy. 



9. Sisters (1), Crook County: Pure stand of yellow pine on flat at altitude of about 3,000 feet. Soil: A 

 loose, gravelly sand, nonretentive of moisture. Sisters (2) tract is very similar in every respect to the 

 Sisters (1) tract. 



10. Bend, Crook County: Pure stand of yellow pine on south slopes closely adjoining treeless desert at 

 altitude of 3,700 feet. The soil is shallow and sandy. 



11. Lapine (1) and (2), Crook County: Almost pure stands on a flat at altitude of about 4,200 feet. Soil 

 a loose, sterile, coarse pumice, nonretentive of moisture. The location and physical condition on (1) and 

 (2) are very similar. 



12. Lapine (3), Crook County: Same as Lapine (1) and (2) except located on a lower bench, 15 feet above 

 Deschutes River, so that it, doubtless, receives some helpfiil subirrigation. 



13. Fort Klamath, Klamath County: Stands composed of 25 or 30 per cent of other species on flat at alti- 

 tude of 4,100 feet. Soil: A fine, loose pumice. Climatically, moisture conditions are good. 



14. Crystal Creek, Klamath County: Stand with about 30 per cent of other species on east slope at alti- 

 tude of 4,200 feet. Soil: Rocky, loamy, decomposed lava. Moisture conditions are good. 



15. Odessa, Klamath County: Stand averaging 85 per cent yellow pine on benches and gentle east slope. 

 Altitude: About 4,200 feet. Soil: rocky, loamy, decomposed lava. 



16. Meadow Lake, Klamath County: Stand about 90 per cent yellow pine on rolling hills at altitude of 

 4,500 feet. SoU: Loamy, decomposed lava, probably with some lime content. 



17. Keno, Klamath County: Practically pure stand on low rolling hills at altitude of 4,200 feet. Soil: 

 Loamy, decomposed lava; site rather dry in summer. 



18. Embody, Lake County: Stand practically pure yellow pine on easterly slope at altitude of 5,000 feet. 

 Climate: Rather dry and severe. Soil: Loamy, decomposed lava. 



