176 



THE PRINCIPLES OF SOIL MANAGEMENT 



be raised in soils of different texture. (2) By the total 

 amount of water raised through a given height in a 

 definite time. The time element enters into both sorts 

 of measurements, and is an especially important con- 

 sideration in clay soil where the movement is generally 

 very slow. 



* 



Table XXIX 

 Showing Height of Rise of Water in Dry Soils of Different 

 Texture, as Shown in the Above Curves 



These materials were sifted to fairly uniform sizes, 

 according to the scale given above (page 73). The silt 

 was a natural material, containing a large amount of 

 very fine sand, together with some clay. It might be 

 termed a light silt loam. It will be particularly noted 

 that the smaller classes of particles silt and clay 

 have a relatively large influence on capillary movement. 

 Above the class of fine sand, there is not much variation 

 in the height of rise for different textures, the total 

 height attained being slight. 



