2. Site preparation and vegetation control should be used to improve ponderosa 

 pine seedling survival and growth. On steep slopes in habitat types similar 

 to this study, 3- to 4-foot -wide scalps (hand-made) with a simazine herbicide 

 treatment (6 grams/10 sq.ft. for simazine 4G) in the fall should lead to 

 reasonable survival levels. Planting unprepared sites would require 3 to 



4 times as many seedlings, and a corresponding cost increase, to reach a 

 3-year stocking standard. 



Natural regeneration was not considered in these tests. Because of the inherent 

 problems of planting seedlings in the shallow soil of these steep slopes, and because 

 of the high costs, a third recommendation is advisable, as follows: 



3. Further study should include comparisons with natural regeneration systems. 



Literature Cited 



Daubenraire, R. , and Jean B. Daubenmire 



1968. Forest vegetation of eastern Washington and northern Idaho. Wash. Agr. 

 Exp. Sta. Tech. Bull. 60, 104 p., illus. 



Hall, Dale 0., and James D. Cuitis 



1970. Planting method affects height growth of ponderosa pine in central Idaho. 

 USDA Forest Serv. , Res. Note INT-125, 8 p. 



Kidd, W. J,, Jr. 1961. High-intensity rainstorms on the Boise and Payette National 

 Forests. USDA Forest Serv., Intermountain Forest § Range Exp. Sta. Res. 

 Note 81, 4 p. 



1964. Probable return periods of rainstorms in central Idaho. USDA Forest Serv. 

 Res. Note INT-28, 8 p. 



Lawrence, William H. , Nelson B. Kverno, and Harry D. Hartwell 



1961. Guide to wildlife feeding injuries on conifers in the Pacific Northwest. 

 West. Forest. 5 Conserv. Ass., Wash. Forest. Protection Ass., Indust. 

 Forest. Ass., in coop, with Univ. Wash., Coll. Forest., 44 p. 



Romberger, J. A. 



1963. Meristems, growth and development in woody plants. U.S. Dep. Agr. Tech. 

 Bull. 1293, 214 p. 



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