240 ON THE CHEMICAL CONSTITUENTS OF SOILS. 



nitrogenous matter, but no appreciable trace of 

 trates. 100 parts of the soil contained: — 



Silica 



Alumina 



Peroxide of iron 



Peroxide of manganese 



Lime 



Magnesia 



Potash, principally in combination with silica 



Soda, idem 



Phosphoric acid, combined with lime and iron 



Sulphuric acid, combined with lime 



Chlorine (in common salt) 



Humus, soluble in alkalies 



Humus .... 



Nitrogenous matter 



77-209 

 8-514 

 6-592 

 1-520 

 0-927 

 1-160 

 0140 

 0640 

 6-651 

 0-011 

 0-010 

 0-978 

 0-540 

 1108 



100-000 



ni- 



It is apparent from the above analysis that, not- 

 withstanding the long period during which this land 

 h^s been cultivated without manure, it still remains 

 very rich in matters adapted for the nutrition of 

 plants. 



SOILS IN HUNGARY. 



37. Analysis of a very fertile soil from Esakang. 

 100 parts of the earth contained : — 



Very fine siliceous sand 

 Earthy matter 



. 2-820 

 97-180 



100 000 



The aqueous decoction of the soil contained princi- 

 pally gypsum, common salt, silica, magnesia, and 

 humus. 100 parts of the soil yielded : — 



