LIST OF ILLUSTRATIONS


The farm equipment--plants, soils, animals, tools,
buildings _Frontispiece_

Figure Facing Page

1. Specimen plants for study 6

2. The first effort of a sprouting seed 7

3. Germinating seeds with roots 7

4. To show that plant roots take water from the soil 10

5. To show that plant roots take food from the soil 10

6. A radish root, from which the stored food has been
used to help produce a crop of seeds 11

7. A sweet-potato root producing new plants 11

8. Sweet-potato roots 14

9. Soy-bean roots 15

10. A plow stopped in the furrow, to show what it does to
the roots of plants when used for after-cultivation 18