Report of Supervisors' Meeting. 431 



with a broader, clearer, happier view of the work before you, its 

 object will be accomplished. 



SILVICULTURE 



January 24, 191 1. Chairman, Mr. Moore. 



Supervisor W. J. Morrill, of the Rio Grande, read a paper 

 on Silvicultural Systems on the National Forests, which is sum- 

 marized as follows : 



As a general rule, protective forests call for the selection 

 system of silvicultural treatment. The first requirement of our 

 Forests is that they shall serve for protective forests, and only 

 secondarily, as a source of supply for lumber, hence the selec- 

 tion system promises always to be the system most commonly 

 used on our forests. 



The Selection System Under Sheeterwoods. 



The disadvantages of this system are: 



1. The cost of logging is high, because a large area must be 

 covered for the crop. 



2. It is claimed that growth is 10 per cent, slower than in other 

 systems of silviculture. 



The advantages are: 



1. Less skill is required to carry out the system, and therefore, 

 less liability to make silvicultural mistakes. 



2. The timber is usually of large size, and, therefore, is mar- 

 ketable in places where small timber is not. 



Sheeterwood Group System. 



Advantages : 



1. This method can be used to best advantage only where a 

 market exists for small lumber and cordwood. 



2. It is claimed that it protects young growth satisfactorily 

 from frost and snow and against drought. 



3. No data is available to show how it compares with other 

 systems in the relative production of wood. 



Disadvantages : 



I. It opens up the soil to drying influences more or less accord- 



