12 



IMPROVEMENT THINNINGS IN 



which would be removed if the stand was thinned were noted sep- 

 arately. From this data a table of the yield from pine thinnings 

 was made and published at that time. We print it again in this 

 pamphlet, on account of its connection with the subject. 



YIELD FROM THINNINGS. 

 Trees under 5 inches, from report of the New Hampshire Forestry Commission, 1906. 



MISCELLANEOUS CUTTINGS. 



There are many kinds of cuttings which one can make to improve 

 woodland, which cannot strictly be called thinnings, because their 

 primary object is not to open up the crown cover, in order to 

 stimulate the growth of the trees. It is not always possible to 

 draw a hard-and-fast line between such improvement cuttings and 

 thinnings, because one may partake of the nature of the other, 

 and the two may be carried out at the same time. Such cuttings 

 can best be suggested by a few examples. 



We will suppose that an insect pest which attacks some particu- 

 lar species of tree, for instance, maples, is more or less prevalent 

 in a region. As a matter of protection, the owner of mixed wood- 

 land might go through it and take out all the maples, so as not 

 to attract the insects to his land. The removal of hard woods 

 from a pine stand as a precaution in fighting gypsy moths is an- 

 other protection cutting, which we have described elsewhere in 

 this bulletin. 



One often finds among the woods large, spreading old trees, more 

 or less decayed and of little value for timber. It is good forest 

 policy to cut such trees down, and to allow the large amount of 

 ground space which they occupy to come up to a new growth of 

 more value. 



