THE WOOD CROP 285 



QUESTIONS AND PROBLEMS 



1. In what ways do the forests of the United States affect the indus- 

 tries of your own state ? 



2. What forest products used in this state are grown within your state 

 boundaries ? 



3. What is the source of the timber shipped into your locality? 



4. What is the acreage of timberland growing in this state? 



5. What is the nature of your state forestry organization? 



6. What steps has your state taken to protect and improve the stand 

 of growing timber? 



7. In what ways do forests conserve moisture? 



8. In what ways do forests equalize temperature? 



9. How many farmers of your school community have planted wood lots ? 



10. What materials are the wood lots of your own community producing ? 



11. What species of trees are best adapted to your state ? to your locality ? 



12. If fence posts are worth 35 cents each, and if an acre will produce 

 2000 posts in 12 years, will it be profitable for the farmer to grow fence 

 posts ? 



EXERCISES 



In a representative wood lot or native wooded area accessible to 

 the school, select an acre as the basis of practical study. 



1. Prepare a list of all the trees. 



2. Measure the diameter of all the trees at the same height, and 

 determine the average for each species. 



3. Select an average sample tree of each of some of the important 

 species, and if the tree may be cut, determine the following points : 

 (i) the age of tree; (2) the volume of the trunk in cubic feet, and 

 of the limbs in cords ; (3) the rate of growth of trunk by decades, in 

 cubic feet ; (4) the stages of development in which these trees made 

 the greatest growth in volume ; (5) the average annual rate of growth 

 per acre in cubic feet. 



4. Mark trees that should be removed in making an improvement 

 cutting. 



5. Select one of the open spaces in the wood lot for underplanting, 

 by the following methods: (i) seed-spot planting; (2) broadcast 

 seeding; (3) planting seedlings of tolerant species. 



