MANAGEMENT PLANS THE NATIONAL FOEESTS 



88 



Table 9. — Summary of estimates'^ 



[M feet, board measure] 





Virgin stands 



Cut-over lands 





Type 



United 



States 



acessi- 



ble 



Dis- 

 puted 

 strip 



Santa 

 Bar- 

 bara 

 grant 



Total 



acessi- 



ble 



United 

 States 

 inac- 

 cessible 



United 

 States 



j)i3. Santa 

 puted ^l^- 



«t"P ^ g'ifnt 



! 



Sd" ^°'»' 



Total 



Pine 



Douglas fir 



Spruce 



11, 264 

 24.903 



87, 869 



1,523 

 13, 927 



21, 362 



12,787 



38,830 



9,659 1118,890 



• 

 9, 100 9, 805 

 4, 671 6, 586 

 15, 500 I 8, 967 



7,852 



1, 719 1 9, 863 

 6,999 



1 

 97 \ 17, 754 



18,168 



15,966 



39, 641 

 61, 669 



150, 356 



Total-.- 



124,036 136,812 9,659 ; 170, 507 



1 1 1 



29,271 1 25,3.58 



1, 719 24, 714 



97 ' 51,888 251,666 



1 As of Dec. 31, 1923. Angostura watershed considered as cut over. Estimates for cut-over lands are 

 for condition immediately after cutting, with no allowance for growth. 



METHODS USED IK AKSIYING AT ESTIMATES 



Virgin stand. — The entire area within the working circle, except the Santa 

 Barbara grant, was covered hj a timber reconnaissance party between 1912 

 and 1914. 



The estimates for the Santa Barbara watershed were made by Hadley and 

 Meredith Jones, the logging engineer for the Santa Fe Railroad. They are 

 used intact. 



The volume of the virgin stands in the Eio Chiquito and Las Trampas areas 

 was arrived at by applying the average volume per acre to the stocked areas 

 gotten from the type map. 



The average volume per acre for the three types is as follows : Pine type. 

 5,215_board feet; Douglas-fir type, 5,220 board feet; spruce type, 6,075 board 

 feet. 



Cut-over areas. — Stand tables were constructed from strip surveys, made in 

 all types in the cut-over stand. The volume per average acre was gotten by 

 applying the volume table to the stand. The total estimate was therefore 

 arrived at by multiplying the number of acres cut over in each type by the 

 volume per acre for that type. 



See Tables 5, 6, and 7, in " Growth and yield data for the important timber 

 species in northern New Mexico." 



On the Picuris strip the total volume left, arrived at by the above method, 

 equals 16,641,000 board feet. The volume left, arrived at by applying the per 

 cent of volume left to the total cut, was 19,423,000. In order to be conservative 

 the per acre basis method will be used. 



The average stand on an acre immediately after cutting the virgin stand is 

 for the pine type, 1,862 board feet, 12 inches and above ; the Douglas-fir type, 

 1,653 board feet, 12 inches and above ; and for the spruce type, 2,915 board feet, 

 10 inches and above. 



INSTRUCTIONS EEFEERING TO MAEKING AND BRUSH DISPOSAL 

 [From administrative instructions dated June 30, 1922, in Santa Barbara exchange case] 



Marking. — Since all yellow pine and Douglas-fir types on the exchange area 

 have been marked, cut over, cleaned up, and accepted, the discussion here on 

 marking will deal only with the pure alpine type, in which all cutting from the 

 present to the end of the agreement will be done. 



Description of type : Beginning at the northern extremity of the area along 

 the boundary between the national forest and the Santa Barbara grant, average 

 elevation 10,000 feet, the pure alpine type is well established, with very rarely 

 an isolated Douglas fir or white fir. There are only three commercial species 

 in this type — in order of their importance — Engelmann spruce (Picea engel- 

 manni), 50 to 75 per cent; alpine fir {AMes Jasciocarpa), 25 to 50 per cent; 

 bristle-cone pine {Pimis aristata), 0.1 per cent. Advancing up the watershed 

 from the north, 10,000 feet elevation, to the south, 12,000 feet elevation, Engel- 

 mann spruce increases from 50 to 75 per cent of the stand ; alpine fir decreases 

 from 50 to 25 per cent ; tie timber increases from 50 to 75 per cent ; and the 

 stand changes from very uneven aged, with the ground more than fully stocked 

 with reproduction on the lower end, to almost even aged, with little reproduction. 

 on the upper end of the area. 



