
U. S. DEPARTMENT OF AGRICULTURE.
FARMERS' BULLETIN No. 67.
BY
Chief of the Division of Forestry.
[Reprinted from the Yearbooks of the U. S. Department of Agriculture
for 1894 and 1895.]

GOVERNMENT PRINTING OFFICE.
1898.
LETTER OF TRANSMITTAL.
U. S. Department of Agriculture,
Division of Forestry,
Washington, D. C., December 4, 1897.
Sir: I have the honor to recommend that the two articles contributed by me to theYearbooks for 1894 and for 1895 on forestry for farmers be reprinted as a Farmers'Bulletin. The articles contain information in popular form regarding the growth oftrees, the planting of a forest, treatment of the wood lot, the cultivation of thewood crop, influence of trees, etc. A wider distribution of this information, forwhich there is still considerable demand, would, I believe, result in acquaintingfarmers with a subject the importance of which has not always been duly recognized.
Very respectfully,
B. E. Fernow, Chief.
Approved:
James Wilson, Secretary.
| Page. | |
| How trees grow | 3 |
| Food materials and conditions of growth | 3 |
| Soil conditions | 4 |
| Light conditions | 6 |
| Physiology of tree growth | 9 |
| "Sap up and sap down" | 10 |
| Progress of development | 11 |
| Growth in length and ramification | 11 |
| Growth in thickness | 14 |
| Form development | 17 |
| Rate of growth | 19 |
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