Other Current Literature. 93 



Range Improvement by Deferred and Rotation Gracing. By 

 A. W. Sampson. Bulletin of U. S. Department of Agriculture, 

 No. 34. Washington, D. C. 191 3. Pp. 16. 



A discussion of the factors which cause ranges to deteriorate; 

 requirements of plant growth ; effect of grazing on the forage 

 crop; application of deferred grazing to range management. 



The Blights of Coniferous Nursery Stock. By C. Hartley. 

 Bulletin 44, U. S. Department of Agriculture. Washington, D. 

 C, 1913. Pp. 21. 



The writer summarizes as follows the blights most common 

 in nurseries: 



1. Sun scorch. — The most common summer trouble which is 

 caused by excessive water loss. Successful preventive measures 

 are watering, shading, and avoidance of crowding. 



2. Winter killing. — Due to tops of plants drying out when soil 

 is frozen. Preventive measures most used consist of a light 

 straw mulch and windbreaks. 



3. Mulch injury. — Killing of tops through mulching may be 

 prevented by avoiding heavy, close mulches. 



4. Needle diseases. — There are a number of needle-destroymg 

 fungi, which so far have done little damage in nurseries in the 

 United States. Bordeaux mixture spray will prevent damage 

 from any of them. 



5. Red cedar blight. — Common on red cedar seedlings and 

 transplants. Causes and methods of prevention are unknown. 



Report of the Forester, U. S. Forest Service, 1913. Wash- 

 ington, D. C. Pp. 56. 



National Forest Areas, June 30, ipiS- U. S. Forest Service. 



A tabular statement showing the location by State, National 

 Forest District in which located, Supervisor's headquarters, acre- 

 age, etc., of each National Forest. 



The net area of National Forest lands is given as 165,516,518 

 acres. 



The Use Book: A Manual for Users of tJte National Foi-esfs. 

 U. S. Forest Sotncc. Washington, D. C. 1913. Pp. 

 This contains the greater part of the information found in 



