STERILE SOIL. 109 



Silica, with coarse Silieious Sand 95*843 



Alumina 0*600 



Protoxide and Peroxide of Iron 1-800 



Lime in combination with Silica 0-038 



Magnesia 0*006 



Potash and Soda 0*005 



Phosphate of Iron 0*198 



Sulphuric Acid 0-002 



Chlorine 0*006 



Humus, Carbonic Acid and Water. . . . 1-502 



Total 100-000 



The poverty of this soil is apparent from the 

 small quantity of lime, magnesia, potash and 

 phosphoric acid found in it. The addition of 

 marl was found to have a marked effect upon it. 

 The following is the analysis of a soil that was 

 supposed to be very barren, but which, after the 

 application of land plaster or gypsum, produced 

 large crops of red clover, peas, beans, etc. The 

 surface is a fine-grained loamy soil. (A) is the 

 analysis of the surface, (B) of the subsoil ; 100 

 parts of each contained : 



(A) (B) 



Silica, with Silieious Sand 90*120 90*324 



Alumina 2*106 2*262 



Peroxide and Protoxide of Iron.. 3*951 2*914 



Peroxide of Manganese 0*950 2*960 



Lime 0*539 0*532 



Phosphoric Acid 0*367 0*122 



Magnesia, with Silicate of Potash. 0*750 0*340 



Potash 0-067 0*304 



Soda 0*010 trace. 



Sulphuric Acid trace. 0*010 



Chlorine 0*100 0*004 



Humus and decaying veg. matter.. 0*900 



Loss 0*140 0*228 



Total 100*000 100*000 



