166 



If comparison is made of the changes which have occurred 

 during the 1 20 minute 'and the 18 hour intervals, it will be seen 

 that the same marked differences are shown. 



From this grouping of the data it is seen that the tendency 

 has been for the absorption of potash to increase with the longer 

 interval of contact, and for the lime and magnesia to be absorbed 

 less, or else more to go into solution. Under the influence of 

 the "A" solution, however, the fixation of potash has been less, 

 or more has gone into solution with two of the soil conditions, 

 namely, under the poor and good com ; at the samei time, the 

 soil under the poor corn has fixed lime instead of throwing it 

 into solution. 



