followed out in the marking. Generally no openings of more 

 than one-ha^f to tln^ee -quarters of cji acre were nacle in the 

 crown covor and whenever the invasion of "brush appeared 

 lively such openings were still further roct rioted oven if 

 this involved the leaving of trees apparently ripe* 7/here 

 "brush had already gained a foothold, nature, diseased and 

 oven deteriorated trees if wol? located wera left to con- 

 tend with it, "but only when no 1201-0 suitable trees were 

 available , 



In calculating tho sufficiency of advance repro- 

 duction, due all o". /an oe was made for unavoidable damage to 

 growth during the course of logging operations but very 

 little at ten'; ion, however, wcs paid to the leaving of trees 

 for sood because of anticipated damage from fire. TTherover 

 the reproduction or. the ground appearo". to be suiiicient, 

 seed trees were out with the idea that firos are to be elim- 

 inated frca consideration in the futv.re. 



Groat caro was t alien in this raarlzing to froe groups 

 of reproduction fron shade whenever it was at 5^! apparent 

 that shade was interforing with the grovruh of the young 

 trocs. Fir and codar trees not mature were often out to 

 free pines that wore in need of more light. Observations 

 made during the course of the nar":ins : proved quite conclus- 

 ively that yellow pine reproduction demands more light for 



successful development than we had supposed was necessary. 



(Bo 



