116 Forest Club Annual 



The author points out a great variety of silvical facts 

 which may be obtained in connection with these studies. 



C. G. Bates in writing on "Sample Plots for Forest 

 Studies'" discusses the importance of ecological methods in 

 forest investigations, especially the problems of silviculture. 

 He shows that concrete data is much more valuable and con- 

 vincing than an abstract assertive description. 



In a later paper" Mr. Bates mentions a new departure in 

 permanent sample plot study. The Forest Service and the 

 Weather Bureau are co-operating in an experimental stream- 

 flow study. In this case the forested and non-forested water- 

 sheds are the sample plots. Accurate measurements of me- 

 teorological factors are being made to determine their influ- 

 ence on the ecological and silvical factors. 



Practically all of the permanent sample plot studies which 

 have been made heretofore were for the purpose of studying 

 directly or indirectly the silvical or silvicultural factors in- 

 fluencing the forest. Now that the organization and much of 

 the preliminary reconnaissance has been completed by the 

 Forest Service much attention is being turned toward inves- 

 tigative work. It is only within the past two or three years 

 that the establishment of permanent sample plots on the Na- 

 tional Forests of District 5 of the Forest Service has been 

 undertaken. The chief purpose of these plots has been to 

 study growth and reproduction. A number of such plots were 

 established in northeastern California on the Tahoe National 

 Forest during the past season. On one of these a new study 

 was undertaken in connection with growth and reproduction. 

 This study is intended to show a comparison between the ulti- 

 mate net returns from regulated and unregulated cuttings 

 and at the same time a collection of data can be made which 

 could be used in a later study of the effect of marking on 

 Government timber sale areas. 



A brief description of this part of the Forest may aid in 

 a better understanding of the methods of study. This plot is 

 located on a Government timber sale area containing about 

 one hundred and sixty acres of Jeffrey Pine and White Fir, 

 which had been cut over the previous year. This portion of 

 the Forest lies on the east slope of the Sierra Nevada mount- 



iForest Club Annual, Uni. of Nebr., Vol II, p. 55, 1910. 

 2 Proceed. Soc. Am. For., Vol VI, No. 1, p. 53, 1911. 



