NATURAL AREAS AND REGIONS 



237 



Within each area are several plots of 

 from 4 to 12 acres on which all trees are 

 numbered and located on a map. 

 Diameter and height measurements 

 are made every 5 years. Progress of 

 reproduction is checked annually. A 

 few of these small plots are fenced 

 against all grazing, but this condition 

 will be maintained only until reproduc- 

 tion is established. All but S-6 are 

 subject to future cutting in 50 to 75 

 years. Established 1909-1913. 



Flagstaff*, A. T. & S. F. R. R., 10 

 to 30 mi. Detailed information at 

 Southwestern Forest Experiment Sta- 

 tion. G. A. Pearson. 



Sample plots wilhin National Forests 

 (New Mexico} 



Datil National Poorest. Sample plots 

 S1A, SIB, S2A. Area about 10 acres 

 each. S1A and SIB are in a canyon at 

 about 8300 ft. elevation. The composi- 

 tion is western yellow pine, Douglas 

 fir and limber pine. Plot S2A is com- 

 paratively level, pure western yellow 

 pine. All plots logged and established 

 1910; all are grazed. Trees numbered 

 and mapped, diameters and heights 

 measured every 5 years. 



MagdalenaJ, A. T. & S. F. R. R., 

 Supervisor's headquarters. 



Gilo, National Forest. Sample plots 

 S1A and S2B. Area 6 acres each, practi- 

 cally pure western yellow pine, about 

 70% cut. Plots established 1911. Trees 

 measured every 5 years. Both plots 

 are grazed. 



Silver CityJ, A. T. & S. F. R R., 

 Supervisor's headquarters. 



Santa Fe National Forest. Sample 

 plots, Pecos S1A and SIB and Jemez 

 S1A and S2A and S3A. Area 6 acres 

 each; western yellow pine with varying 

 mixture of Douglas fir and limber pine. 

 Altitudes around 7500 ft. All plots cut, 

 removing 60 to 70%, and all grazed. 

 Established 1911. 



Santa Fe}, A. T. & S. F. and D. & 

 R. G., Supervisor's headquarters. 

 G. A. Pearson. 



10. NATIONAL FORESTS OF THE 



ROCKY MOUNTAIN 



DISTRICT (2) 



BY C. G. BATES 



There are 26 National forests in this 

 district, Colorado having 15, Wyoming 

 5, South Dakota 2, Nebraska 1, Michigan 

 1 and Minnesota 2. 



Owing to the extremely diverse clima- 

 tic conditions found in going from South 

 Dakota to the Rocky mountains, from 

 the southern border of Colorado to Min- 

 nesota, and from the western to the 

 eastern slope of the Rockies it has been 

 thought best to give a detailed account 

 of each forest rather than to attempt 

 a general description for the entire 

 district. 



For the sake of brevity and to avoid 

 monotony, a tabulation is given be- 

 low showing the name and area of 

 the forest, the supervisor's headquarters 

 and the directions for reaching it. 

 Under each description there is given a 

 brief account of the plant and animal 

 life, the special physiographic features 

 and the natural areas reserved or suita- 

 ble for reservation. 



Colorado (15) 



