ABSORPTION OF SALTS BY SOILS. 



133 



It is seen, from the table, that (1) large amounts of both 

 bases have been fixed by these soils; (2) much more potash 

 than soda has been removed from solution; (3) there are large 

 differences between the fixing powers of the different soils ; (4) 

 least potash was fixed by the sterile sand and next to it stands 

 the other sandy soil; (5) the percentage relations) between the 

 amounts of the two bases fixed by the several soils are quite 

 similar, the same soils fixing most and least 1 of each base. 



The same investigator conducted a similar experiment with a 

 marly soil, using anhydrous sodium sulphate in the proportion 

 of 44.93 grains to 28000 of water and 3500 of soil; the diges- 

 tion covering 4 days. The amount of soda removed from the 

 solution was at the rate of 1809 parts per million of soil or 

 .1809 per cent. 



OBSERVATIONS OF KUKLENBERG. 



This investigator made a series of studies relating to soda- 

 fixation entirely similar to the one reported for potash, p. 130, 

 and the results appear in the next table. 

 Amounts of soda absorbed from different solutions oj the same soil. 



