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 ? \\'hy ? 



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

 ing in the woods. Account for the difTerences 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? 



