428 



IOWA DEPARTMENT OF AGRICULTURE 



VINES. 



Clematis jackmanii, 

 '^lematis paniculata, 

 Trumpet honey-suckle, 



Boston ivy, 

 Engelman ivy. 

 Bitter sweet. 



TRIMMING TREES. 



The climate of our state is more or less severe upon tree life of all 

 kinds. Trees are frequently injured by the splitting down of the 

 branches due to sleet-storms and severe winds. This condition requires 

 pruning to insure the proper healing over of the wound, otherwise de- 

 cay enters in and the life of the tree may be seriously shortened. In 

 removing injured branches, particular pains should be taken to make 

 the cut up close to the remaining branch and parallel to it. Under 

 these conditions the wound is nourished and gradually heals over. 

 Healing does not take place where a stub is left and decay gradually works 

 down into the main stem. For cuts over two inches in diameter the 

 surface should be coated with thick white lead. 



In this connection the practice of topping back large trees, such as 

 the soft maple, should be discouraged. This can in no manner change a 

 soft-wooded tree to a hard-wooded kind and in the majority of instances 

 the central portion of the large stub dies back and decays, leaving only 

 a shell of live bark around the circumference, and in a few years the 

 tree goes to pieces and is ready for the brush-pile. It must also be 

 remembered that the leaf system takes part in the work of digestion and 

 that a large tree entirely defoliated in this fashion has been treated in 

 a very severe manner. 



Plant Shrubbery in Clumps; do not Scatter Single Specimens over the Yard 



