CROTALARIA 



103 



Composition of 100 kilos of Natural Substance. 



According to these results, the sum of fertiHzing matters 

 contained in the total harvest gives, with the different weights 

 obtained from each harvest, the following figures : — 



Total of Fertilizing Matter. ^ 



Silica 



Chlorine 



Sulphuric acid 



Phosphoric acid 



Lime 



Magnesia ... 



Potash 



Soda 



Oxide of iron 



Carbonic acid, &c. ... 



Total mineral matter 



Dry matters 



Nitrogen 



Weight of the green crop 



The figures are for the crop from one arpent (0-422 of a hectare). 



