MOVEMENTS OF SALTS IN SOILS. 105 



INFLUENCE OF CAPILLARY MOVEMENT IN SOILS UNDER NAKED 

 FALLOW TREATMENT UPON THE AMOUNTS OF WATER-SOLUBLE 

 SALTS IN SOILS. 



One of the purposes of this investigation was to ascertain if 

 the amount of water-soluble salts of soils change under naked 

 fallow treatment, and if so, in what manner; and the data of 

 the tables on pp. 100, 103 arid 104, m,ay be used to sliow if a 

 measurable change has occurred during the 70 days of treatment 

 to which the six soils have been subjected. The addition of river 

 water to maintain capillary movement did not do violence to 

 normal field conditions, for it was itself a ground water closely 

 similar to that normal to the several soil types under observa- 

 tion. The abnormal conditions are the large and rapid move- 

 ment of the water ; its somewhat higher temperature ; and per- 

 haps a slightly different aeration than would be normal to fields. 



If the total water-soluble salts observed in these soils at the 

 time they were placed under treatment are increased by the 

 amounts of salts carried to them in the water, the results may be 

 compared with the amounts found at the close of the capillary 

 period to show whether measurable changes have occurred. 

 Such a comparison is made in the following table: 



