Code 13: Overstory removal 



Code 13 includes any stand which contains commercial size trees in 

 excess of 1,000 b.f. per acre, and which also meets one of the following 

 conditions: 



The trees in question are relicts, i.e., not part of the manageable stand 

 component. 



The trees in question represent the upper story of a two storied stand, 

 but they are inadequately stocked to be treated as a separate 

 management component. 



Possible combinations: (13, 22, 33), (12, 13), (12, 13, 22), (13, 33), 

 (13, 22), (13, 22, 23), (13, 20), (13, 20, 23), (13, 20, 22, 23), 

 (13, 23), (13, 21). 



Code 14: Two storied stand (overstory, harvest - high risk; understory, 

 manageable) 



This category is made up of two storied sawtimber stands meeting the 

 requirements of treatment code 10. The following conditions also exist: 



1. The overstory has a crown density of 10-50%. 



2. One or more of the following treatment codes is indicated for the 

 understory: 12, 20, 22, 30, or 33. 



Code 15: Two storied stand (overstory, harvest - low risk; understory, 

 manageable) 



Two storied sawtimber stands meeting the requirements of treatment code 

 11, plus the following conditions, are assigned this code: 



1. The overstory has a crown density of 10-50%. 



2. One or more of the following treatment codes is indicated for the 

 understory: 12, 20, 22, 30, or 33. 



Code 20 : Precommercial thinning 



There are two general types of stands which qualify for precommercial 

 thinning. These are: 



1. Seedling and/or sapling stands which contain a manageable compo- 

 nent of desirable or acceptable crop trees, but which will suffer 

 growth loss from competition prior to reaching merchantable size, 

 if stocking is not reduced. 



2. Sapling to pole size Douglas-fir, western larch, ponderosa or lodge- 

 pole pine which meet all of the following characteristics: 



a. Stand is currently growing at less than full potential because 

 of competition. 



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