24 COMPOSITE TYPE OX THE APACHE NATIONAL EOBEST. 



out of the ground, alternate strips in two plots were covered with 

 brush. 



Only one count has been made since the reproduction plots were 

 established in 1910. While the data obtained for the single year 

 are not sufficient to form a basis for definite conclusions, they are of 

 some value in devising a system of management. It is intended 

 that more counts shall be made on each reproduction plot, and if 

 possible more light readings taken at the stations already established. 



KEPEODUCTIOX PLOT 1. 



This plot is located within a stand of medium density on a level 

 area at an altitude of 9,150 feet. The northern half is shaded during 

 the greater part of the day by several large Douglas firs. Some 

 spruce poles and several aspen saplings cast an appreciable amount 

 of shade when in leaf. The southern half has much less shade, there 

 being only one large western yellow pine. This part of the plot is 

 covered with a dense growth of mountain bunch grass, which grows 

 but sparsely on the other half. The soil is comparatively free from 

 rocks, and consists of loam with a clay subsoil. Humus and leaf 

 litter are found to some extent over the northern half of the plot, 

 being thickest under the large trees and around the stumps cut hi 

 1910. The average light intensity after cutting at five stations on 

 this plot is 0.291. x 



On this cutting plot a general selection system of cutting was 

 practiced. All mature and overmature trees, as well as those which 

 would become overmature within 40 years, were removed. Most of 

 the healthy young trees, together with two standards, one Douglas 

 nr and one yellow pine, were left for the production of seed. Since 

 there is already an abundance of spruce reproduction, most of the 

 trees of this species above a diameter of 12 inches were cut. 



Although the western portion of the reproduction plot is shaded, 

 and there are no yellow-pine seed trees on or near it. seedlings of this 

 species predominated in 1910. Spruce and fir are found in greatest 

 numbers where there is some protection from the sun. On the south- 

 ern half of the plot, where the light intensity is greatest, spruce is 

 entirely lacking and there are but few Douglas fir seedlings. Although 

 western yellow pine germinates hi this exposed situation, practically 

 none of the seedlings were alive the second year. [Reproduction, espe- 

 cially that of yellow pine, does not occur immediately around the 

 base of the older trees and stumps. However, this is not the case 

 under young spruce trees, which have broad crowns. While the 

 absence of yellow pine reproduction may be due hi part to the shade, 

 it is largely accounted for by the depth of the litter, which makes a 

 poor bed for the germination of the seed. In the yellow pine type 



1 1.0 represents full light. 



