186 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



All of the tree studies which have been under way for a number of 

 years are now completed. A comprehensive study was begun of the 

 eastern oaks. 



The effect of destructive logging upon the permanent development 

 and welfare of local communities and the part which the marketing 

 of woodlot products plays in the agricultural settlement of a new 

 region were made subiects of special study. Other studies of the 

 problems encountered by farmers in connection with the marketing 

 of woodlot products were continued through field work in Georgia 

 and South Carolina. There is room and need for the extension of 

 this work. Reports on marketing woodlot products, several of which 

 have already been published by the State agencies concerned, were 

 completed for Missouri, Ohio, Tennessee, Minnesota, Indiana, Ken- 

 tucky, Michigan, and Wisconsin. Publications on "The Care and 

 Improvement of the Woodlot," "Measuring and Marketing Woodlot 

 Products," and "The Status and Value of the Farm Woodlot," were 

 issued. The preliminary work in Indiana and Tennessee was fol- 

 lowed up in cooperation with the county agents. Sample woodlots 

 were established in several of the counties, and their owners and the 

 county agents his true ted in the best methods of taking care of them. 



The economic survey of the farm woodlots in the eastern United 

 States, which is being carried on in cooperation with the Office of 

 Farm Management, was extended to the States of Pennsylvania, 

 Connecticut, Vermont, South Carolina, North Carolina, Tennessee, 

 and Indiana. 



The permanent sample plots established in the Eastern States in 

 1905 and 1906 came up for the third remeasurement. Being older 

 than the plots on the National Forests in the West, their remeasure- 

 ment has secured more conclusive data as to their growth, yield, and 

 other changes in the development of the stand. 



A revised classification of the forests of the country was begun 

 through a study of the available data on the distribution of the 

 forest types. This is an important project in that it will furnish 

 basic knowledge for use in other investigations and in working out 

 forest management. A preliminary map of the principal timber 

 regions of South America was prepared in connection with the Pan 

 American Congress. 



Publications on the "Spruces and Balsam Fir of the Rocky Moun- 

 tains" and the "Pines of the Rocky Mountains" were issued. Range 

 maps of 115 tree species were prepared for use in connection with 

 different publications and 2,000 range notes were collected. 



Approximately 25,000 basket willow cuttings were distributed 

 during the spring. Of these, 7,700 were sent to schools and institu- 

 tions; 1,200 to State foresters; and over 16,000 to individuals. 



Eighteen form, 11 volume, and 15 miscellaneous tables were worked 

 up from 9,923 tree measurements already on file. 



STUDIES IN FOREST PRODUCTS. 



Utilization of National Forest timber. — In forest products investiga- 

 tions bearing upon the utilization of National Forest timber a number 

 of mill-scale and depreciation studies were made. Studies of market 

 conditions, covering chiefly the amount of timber used, the extent to 

 which National Forest material is supplying the demands, and the 



