96 



SOILS: PROPEPT1ES AND MANAGEMENT 



VARIOUS TEXTURAL CLASSIFICATIONS USED IN THE MECHANI- 

 CAL ANALYSES OF SOILS. EXPRESSED IN DIAMETER OF 

 PARTICLES IN MILLIMETERS 



Of these classifications only three need claim our atten- 

 tion that of the Bureau of Soils, that of Hall and 

 Russell (the English classification), and that devised by 

 Atterberg. These represent the groupings used in ex- 

 pressing mechanical soil analyses in the United States, 



1 Osborne, T. B. Methods of Mechanical Soil Analysis. 

 Ann. Kept. Connecticut Agr. Exp. Sta., 1886, pp. 141-158; 

 1887, pp. 144-162 ; 1888, pp. 154-157. 



2 Hilgard, E. W. Methods of Physical and Chemical Soil 

 Analysis. Ann. Kept. California Agr. Exp. Sta., 1891-1892, 

 pp. 241-257. 



3 Briggs, L. J., and others. The Centrifugal Method of 

 Soil Analysis. U. S. D. A., Bur. Soils, Bui. 24. 1904. 



4 Hall, A. D., and Russell, E. J. Soil Surveys and Soil 

 Analyses. Jour. Agr. Science, Vol. IV, part 2, pp. 182-223. 

 1911. 



6 Atterberg, A. Die Mechanische Bodenanalyse und die 

 Klassifikation der Mineralboden Schwedens. Internat. Mitt, 

 f. Bodenkunde, Band II, Heft 4, Seite 312-342. 1912. 



