96 



SOILS: PROPEPTIES AND MANAGEMENT 



Vaeioijs Textueal Classifications used in the Mechani- 

 cal xVnalyses op Soils. Expressed in Diametee of 

 Particles in Millimeters 



Separate 



Osborne! 



HiLG \.m> 2 



Bureau op 

 Soils 3 



English* 



Atterberg 5 



1 



3.000 



3.000 



2.000 



1.000 



20.000 



2 



1.000 



1.000 



1.000 



.200 



2,000 



3 



.500 



.500 



.500 



.040 



.200 



4 



.250 



.300 



.250 



.010 



.020 



5 



,050 



.160 



.100 



.002 



.002 



6 



.010 



.120 



.050 







7 





.072 



.005 







8 





.047 









9 





.036 









10 





.025 









11 





.016 









12 





.010 









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. Rept. Conneeticiit Agr. Exp. Sta., 1886, pp. 141-158; 

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



^Hilgard, E. W. Methods of Physical and Chemieal Soil 

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

 pp. 241-257. 



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

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



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

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

 1911. 



^Atterberg, A. Die Meohanisehe Bodenanalyse und die 

 Klassifilkation der Mineralboden Sehwedens. Internat. Mitt, 

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



