FORESTRY LESSONS ON HOME WOODLANDS 



13 



Arithmetic: Problems showing comparative acreage of crop land 

 and woodland, and percentages of each, will be suggested in the 

 study of this lesson. 



Topic IV. GROWTH OF TREES AND FORESTS 



Aim. — To teach how trees and forests grow. 



Sources of information. — Farmers' Bulletins 173, 1071, 125G, 1486, 

 1517, and 1534. 



Illustrative material. — Potted seedlings, pots or boxes, and seeds 

 of trees. A chart showing roots, stems, and leaves of a tree. A chart, 



Figure 7. — Rough, steep, and poor lands and inaccessible parts of the farm increasing 

 farm income by growing trees in permanent woodlands 



or better, an actual cross section of a tree stem showing different 

 parts of the stem, such as annual rings, heartwood, sapwood, bark, 

 and cambium. (Fig. 8.) Leaves mounted so that their structure 

 can be studied. Branches showing bud and twig arrangement. 

 Drawings showing shapes of crowns of trees grown in the open and 

 grown in close stands. (Fig. 9.) 



Guides to study. — The life of a tree and why it is necessary to 

 know something about how trees live. 



The leaves, trunk, and roots, and function of each in the tree's 

 existence. How the tree breathes and gets its food from the soil and 

 air; what travels upward and what downward in the branches and 

 stems. Structure of the leaf and different parts of the trunk. 



