FOREST PROTECTION. 



147 



On account of this great danger to pine timber, and 

 on account of high taxes, the lumbermen have been dis- 

 couraged from holding their pine lands for a second 

 growth, but prefer to cut every tree that can be made 

 into salable lumber and then abandon the land. But 

 even under such conditions, it occasionally happens that 

 the land is not burned over, or only slightly burned, for 



FIG. 54. Agaricus melleus, a fungus that is occasionally very in- 

 jurious to trees by destroying their roots. A, A fruiting portion 

 of the fungus. 



a number of years, when it will generally produce a good 

 second cutting. Some land in Minnesota that was first 

 cut in the early days of the logging industry, when it was 

 customary to cut nothing but that which would make 

 a ten-inch log, have been logged two or three times since, 

 and with a good profit. 



In Minnesota and Wisconsin fires render most of the 

 cut-over lands entirely non-productive, and since the 

 annual increase of the trees that should grow on such 



