6o 



in proper proportion, especially when a large number of species are 

 used. The fewer kinds that are used the easier it is to plant the 

 trees in the best proportion of each kind of tree. 



In some of the clumps of single species the disadvantage of not 

 having two or more kinds mixed is quite as apparent as the disad- 



Half breed collecting seeds of Manitoba maple for distribution among farmers. 



vantage of having so many kinds mixed in the mixed belts. Ash, 

 butternut, black walnut, and elm, which have thin foliage, do not 

 kill the sod when young, and the growth on this account is checked. 

 If other heavy foliaged kinds, such as larch, spruce, pine or box elder 

 had been mixed with these the results would almost certainly have 

 been better. 



