r.i ,/- Forest Service, United States lepartment of Agriculture, 



San Francisco Office) 



;ITST 



)ER INVESTIGATION 



^het proportion of the standing timber should be cr 

 om a given area in order to leave it in the best condition for 

 :r:re continuous production wj 11 be determined scientifically b f y 

 ries of experiments to be conducted by the Forest Service. A r/ r 

 of small areas have been laid off on a timber sale in the Plu 

 Torest, and varying proportions of the stand will be cut on each. 



Periodic observations and measurements will give ae- 



rate data from which conclusions can be drawn. The effect of f5r 

 on young forest growth, the effect of brush cover on stream- flow, 

 the best season for planting :, oung trees, and tests of various ST 

 of trees under various conditions are among the topics listed for 

 study. 



Jl J.L 4 4 



ir it ir IT 



G-6 



