FOKEST SERVICE. 31 



tions, together with an examination of the reservations around San 

 Francisco to learn the advisability of planting. In Vermont a plant- 

 nig plan was prepared for lands around a station of the Bureau of 

 Fisheries. For the Reclamation Service recommendations were made 

 for planting along the interstate canal in Wvoming and Nebraska, 

 and around the reservoir and along the canals of the Salt Rived- 

 project, Arizona. Planting along the interstate canal was begun in 

 May with 60,000 trees from the lialsey nursery. 



To aid settlers in newly irrigated regions, forest-planting investi- 

 gations were started in the North Platte and Truckee-Carson projects. 

 These studies will also cover the questions of planting for the protec- 

 tion of Government canals and on waste lands. In North Dakota 

 recommendations for handling certain timberlands on the Buford, 

 Trenton, Williston, and Nesson irrigation projects were prepared for 

 the State engineer. 



Farmers have been given all possible assistance. Planting plans 

 were made as formerly, and much effective work \vas done thru 

 lectures at farmers' institutes. A lecture at Amarillo, Tex., was fol- 

 lowed by the formation of a tree-planting association with about 600 

 members, who have already set out about 200,000 trees, under advice 

 from the Service, and will set out many more. 



SPECIAL INVESTIGATIONS. 



The possibilities of forest planting on coal lands were studied in the 

 upper Ohio Basin, with special reference to black locust and the 

 danger of damage by borers. Such planting promises to be profit- 

 able, but the use of locust was found unsafe unless the trees are cut 

 for posts when small, or methods are found and applied which will 

 insure control of the insect pest. 



A study of planted and natural timber in Iowa was finished. 



The following investigations were a part of the State cooperative 

 work in California : 



(1) Study of forest planting in agricultural regions. The nearly 

 completed work will cover the field of forest planting for protection 

 and wood supply in the agricultural valleys. 



(2) The relation of forest cover to stream flow. The importance 

 of water for power and irrigation in California led to this investiga- 

 tion, in which many valuable observations were made. 



(3) Study of State lands. This work was entirely completed 

 during the year. The report, as submitted to the California State 

 Board of Forestry, gives information on the location and extent of 

 the State forest lands, with recommendations for legislative action. 



(4) Study of the silvical characteristics and methods of propaga- 

 tion of eucalyptus. This was undertaken because of the newly ap- 

 preciated value of eucalyptus for posts, telephone poles, piling, 

 and ties. 



COOPERATIVE EXPERIMENTAL PLANTING. ' 



In various regions more exact knowledge is needed as to the effect 

 upon species of soil and climate, the adaptability of new species to 

 planting, and the best silvicultural methods. To secure this the 

 Forest Service will carry on systematic experiments in cooperation 

 with various colleges and State forest commissions. The cooperators 

 in all cases furnish the land free and the expenses for plant material 

 and labor are divided equally. This work is now under way in 



