Transcriber Note: Text emphasis denoted as _Italics_. U. S. DEPARTMENT OF AGRICULTURE. ---------- FARMERS' BULLETIN No. 67. ---------- FORESTRY FOR FARMERS. BY B. E. FERNOW, _Chief of the Division of Forestry._ ---------- [Reprinted from the Yearbooks of the U. S. Department of Agriculture for 1894 and 1895.] [Illustration] WASHINGTON: 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 the Yearbooks 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 of trees, the planting of a forest, treatment of the wood lot, the cultivation of the wood crop, influence of trees, etc. A wider distribution of this information, for which there is still considerable demand, would, I believe, result in acquainting farmers with a subject the importance of which has not always been duly recognized. Very respectfully, B. E. Fernow, _Chief_. Approved: James Wilson, _Secretary_. --------------- CONTENTS. ---------- 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 Reproduction 21 How to plant a forest 22 What trees to plant 23 Methods of planting 26