10 



BULLETIN 1264, U. S. DEPARTMENT OF AGRICULTURE. 



stand rough treatment in transit equally as well as those packed in 

 crates. Wet sphagnum moss was used to keep the trees moist. 



Table 4 gives the approximate average number of trees contained 

 in a full-sized burlap roll, with the weights and rate of packing 

 for various age classes of nursery stock. 



Table 4. 



-Average number of trees in a full- sized burlap roll, weight 

 packing for various age classes of nursery stock. 



and rate of 



Species. 



Lodgepole pine 



Western yellow pine. 



EngelmaDn spruce.-. 



Blue spruce 



Age 

 class. 1 



2-1 

 2-1 

 2-2 

 3-1 

 2-3 



Number 

 per roll. 



Average weight. 



Per roll. 



2.0 



1.8 



1.5 

 1.0 



Pounds. 

 65 

 72 



Per M. 



Pounds. 

 32.5 

 40 



50 



75 



Rate of packing 

 per day. 



1 man. 



Jf. 



2 men 

 (packer 



and 

 helper) . 



M. 



1 The first figure in the "age class" column is the number of years the nursery stock was grown in the 

 seed bed, and the second figure the number of years in the transplant bed. 



The average cost of planting stock for the years 1915 to 1919, by 

 age classes, for the principal species grown at the Cottonwood Nurs- 

 ery, is given in Table 5. On account of losses from snow-molding 

 and frosts, which at that time were uncontrolled, the cost for Doug- 

 las fir of all age classes above the 1-0 class was far greater than for 

 any of the other species. 



Table 5. — Average cost of tree production at the Cottonwood Nursery, 1915 to 1919, 



inclusive. 1 





Average cost per 1,000. 



Class of stock. 



Engel- 



mann 

 spruce. 



Blue 

 spruce. 



Norway , ™jf 



s P ruce - j gne 



Western 

 yellow 

 pine. 



Douglas 

 fir. 



1-0 



$0. 436 

 .836 

 1.21 



$0.49 

 1.02 

 1.48 

 6.05 

 7.45 



10.86 

 8.01 



$0. 364 ; $0. 48 

 1. 08 1. 42 



$0.52 

 .84 



$0.53 



2-0. . 



4.22 



3-0 



2.09 





22.42 



2-1 





6.49 



4.77 





2-2 







2-3 











3-1 



6.01 

 10.27 



6. 67 



10.26 





39. 01 



3-2 





43.53 







| 





1 These costs are exclusive of distribution charges, which amounted to approximately $2.50 per M« 

 including overhead. 



FIELD PLANTING. 



PLANTING SITES AND NATIVE TIMBER TYPES. 



In the mountains of the intermountain region there is a regular 

 zonation of forest types, and in each zone there are characteristic 

 differences in planting sites. The highest zone is typified by Engel- 

 mann spruce and alpine fir {Abies lasiocarpa). Below this, Douglas 

 fir or white fir (A. concolor) usually predominates except where 

 through the agency of fire lodgepole pine (in northern Utah, western 



