3i 



Multiflora rose, good wildlife cover and effective as a hedgerow and "living-fense," is an aggressive spreader under 

 some conditions. Its ecology and methods of control are being studied intensively at the I'atuxent Center. (Photo 

 by F. C. Schmid) 



Recreational use of forest land. — The Virginia 

 Unit studied area use in George Washington Na- 

 tional Forest, interviewing 1,532 parties leav- 

 ing the study area. Resultant data yielded a total- 

 use estimate for commercial, residential, and 

 miscellaneous categories amounting to 833,314 

 man-hours with a probable error of ±15 percent. 

 Approximately 83 percent (691,837 man-hours) of 

 this total was recreation use. Component recrea- 

 tion uses were 233,71 1 man-hours in private camps, 

 182,389 man-hours on developed sites, and 275,688 

 man-hours on undeveloped areas, with probable 

 errors of ±26, ±28, and ±21 percent. Hunting, 

 sightseeing, fishing, and primitive camping were 

 the major uses on undeveloped areas. Hunting 



was estimated at 140,517 man-hours, sightseeing 

 at 54,395, fishing at 34.119, and camping at 24,285, 

 with errors ranging from ±26 to ±47 percent. 

 On developed sites, campgrounds received 79 per- 

 cent of the 182,839 man-hours of use. 



The most important result of the study was the 

 development, in the absence of prior knowledge 

 of optimum sample size or allocation of effort, of 

 a stratified random sampling design for obtaining 

 acceptable estimates of total and component rec- 

 reation use on large units of forest land. 



Foreign game introduction program. — Trial 

 liberations of 16 species or subspecies of foreign 

 game birds, including 5 pheasant crosses new to 

 the United States, are currently under way in 23 



40 



