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b. Individual Sppd Tree 



This method is applicable to those types where trees of seed 

 tree specifications are left stondir.'j uniformly throughout the 

 cut area. An average oi seven tr<cs per acre should l.c left for 

 seed source. 



Individual seed trees must be wind firm to remain standing 

 following the cutting of the rest of the stand. Ponderosa pine 

 and western larch are particularly adapted to the individual seed 

 tree cutting method. Thin-barked species such as Douglas-fir, 

 lodgepole pine and Englemann spruce have difficulty surviving 

 slash fires and Englemann spruce is subject to windfall, making 

 these species less desirable to cut by this method. 



c. Seed Tree Groups 



Instead of individual seed trees, it is often more desirable 

 to leave seed trees in groups of from one-fourth to one-half acre 

 in size, scattered uniformly. through the harvest area. The seed 

 trees in these groups should exhibit the same characteristics as 

 individual seed trees. Seed tree groups may be advantageous in 

 the areas where diseased trees are interspersed \"*ith clean or 

 resistant groups. Seed tree groups should be l'>ft as undisturbed 

 as possible and a good fire break built around them. Trees 

 adjacent should be felled away from these groups. 



4. Shelterwood Cutting 



This harvesting method is most often used on themore severe south 

 and west exposures in stands that v/e desire to regenerate tolerant 

 species. It involves the removal of the entire merchantable stand 

 with a series of partical cuts extending not over 20% of the rotation 

 period; the final harvest being an overstory removal. 



An adequate number of trees should remain to protect the site as 

 well as provide seed. At least 10 vigorous dominant or co-dominant 

 seed bearing trees per acre should be left following logging. 



5. Tree Selection 



In areas where the present all or uneven- ?ned stand composition is 

 desirable, the selection system should be used. 



Two common methods in this system are individual tree selection 

 and group selection. In each method th purpose for cutting the mature 

 trees is to perpetuate the all or uneven-aged condition. The amount of 

 timber removed from the area depends upon the distribution of the age 

 classes comprising the stand. 



