ELM TREES AT MINNESOTA STATE EXPERIMENT STATION. 1 85 



ELM TREES AT MINNESOTA STATE EXPERIMENT 



STATION. 



PROF. S. B. GREEN. 



The illustration shows the appearance of elm trees at the en- 

 trance of the Experiment Station grounds. These trees have re- 

 ceived an annual pruning for about seven years, and it has served 

 to give them a very compact form. In pruning, the aim has been 

 to preserve a strong central shoot and to shorten the side branches 

 to prevent their interfering with its growth. Such trees are much 

 less liable to break down in wind storms than those that are left to 

 grow as they naturally will with spreading curved branches. 



Street Elm Trees Trimmed for Uniformity. 



