SOIL STRUCTUEE 



179 



Effects of Texture, Granulation, Humus, and Moisture 

 ON Cohesion of Soils. (Puchner.) 



Soil 



Clay 



2 clay + 1 quartz 



1 clay + 2 quartz 

 Quartz 



2 clay + 1 humus 

 1 clay + 2 humus 



Humus 



Pulverized loam . . 

 Granulated loam 



(granules .5-9 mm. 

 diam.) . . . . 





Pen-etr\tton- I 



MOISTI 



100 



so 



60 



per 



per 



per 



cent 



114 



cent 



cent 



2,404 



9,537 



30 



437 



6,304 



85 



1,887 



3,803 



167 



2,937 



4,237 



44 



754 



4,704 



59 



1,010 



1,704 



115 



1,414 



1,904 



35 



272 



775 



58 



85 



115 



40 



per cent 



11,870 

 12,370 

 10,003 

 5,137 

 7,204 

 4,204 

 1,804 

 1,408 



492 



20 



per cent 



15,037 



13,204 



13,703 



8,370 



9,537 



5,070 



870 



8,125 



808 







per cent 



20,037 



15,704 

 6,057 

 2,370 



12,037 



1,637 



487 



12,358 



1,342 



<>p^o//^o /oa 



Fig. 26. — The effects of texture, humus, and moisture on the cohesion 



of soils. 



