. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Washington, D. C. PROFESSIONAL PAPER June 12, 1918 FOREST DISEASE SURVEYS. By James R. Weir, Forest Pathologist, and Ernest E. Hubert, Scientific Assist- ant, Office of Investigations in Forest Pathology, Bureau of Plant Industry, Missoula, Mont. CONTENTS. Page. Introduction 1 Object of forest disease surveys 2 Disease-survey methods 13 Page. Pathological maps 19 Summary 23 INTRODUCTION. The National Forests are administered with the expectation of their becoming self-supporting thro
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Washington, D. C. PROFESSIONAL PAPER June 12, 1918 FOREST DISEASE SURVEYS. By James R. Weir, Forest Pathologist, and Ernest E. Hubert, Scientific Assist- ant, Office of Investigations in Forest Pathology, Bureau of Plant Industry, Missoula, Mont. CONTENTS. Page. Introduction 1 Object of forest disease surveys 2 Disease-survey methods 13 Page. Pathological maps 19 Summary 23 INTRODUCTION. The National Forests are administered with the expectation of their becoming self-supporting through the medium of returns from such activities as timber sales, grazing, and special-use privileges. Of these operations, that of the sale of timber is, in the National Forests of the northwestern United States, unquestionably of the greatest importance in respect to paying the expense of administer- ing the forest. In district No. 1 in the year 1916 the total receipts from timber sales equaled $439,880 and grazing $50,836. These figures show the relation between the two incomes derived from the princi- pal forest activities of this district. Some few of the forests have al- ready attained a position of self-support. One forest in particular is reported to have outdone all expectations and in so doing has aided in the administration of forests whose incomes have been their expenses. In such self-supporting forests it is always found that a ready market and available timber supply have resulted in a maximum of timber sales. It is, then, a foregone conclusion that timber sales in the National Forests of the Northwest are the main- stay of a self-supporting policy and that all data of value to timber- sale operations are bound to be of value in their successful super- vision. The data and recommendations included in this paper are based on conditions prevalent in district No. 1 of the United States Forest Service. 39732°—Bull. 658—18 1. Please note that these images
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