134 



From this liable it is seen that large amounts of soda have been 

 fixed by this soil and much more from the phosphate and car- 

 bonate solutions than from either of the others. It is also true 

 of this series, as it was of that of Voelcker cited above, that much 

 less soda has been fixed than was the case from the corresponding 

 potash salts. The next table brings into comparison the potash 

 and soda absorptions, as was done with Voelcker's data. 



Mean amounts of potash and soda absorbed by the same soil from 

 5 corresponding salts. 



This grouping of the data shows that practically the same per- 

 centage relation exists between the fixing of the bases from three 

 of the five salts compared ; but the chlorides, nitrates and sul- 

 phates stand in the opposite relation, as to quantity of bases 

 fixed, there being letfst soda and most potash fixed from the sul- 

 phate solutions. This was not the case, however, in the instance 

 cited above from Voelcker's work. 



ABSORPTION OF LIME AND MAGNESIA. 



We cite here the observations of Kullenberg,* which form a 

 portion of work already cited, the method of procedure here be- 

 ing the same as for determinations made on the absorption of 

 potash, soda and ammonia. 



Hoffman's Jahresbericht der Agrikultur-Chemie, 1865, pp. 17-18. 



