ii6 Science of Plant Life 



PROBLEMS 



1. What advantage in resisting wind have tall, columnar tree trunks over 

 equally tall smokestacks or monuments ? What disadvantage ? 



2. What are the perennial food-producing plants of your locality? 



3. Find out how your local gardeners trim their grapevines, berry bushes, and 

 fruit trees. Secure definite information for five of these plants, and deter- 

 mine the reasons underlying the practices. 



4. What are the best trees for street planting in your locality? What trees 

 now planted there are objectionable? Why? 



5. Compare a tree growing in an open field with one of the same species grow- 

 ing in the woods. Account for the differences in arrangement of branches 

 and leaves. 



6. Which will furnish the better lumber, a tree grown in the open, or one grown 

 in the forest? Why? 



