EXPERIMENT STATION BULLETINS. 



687 



TABLE .-!. UATK AND EXTENT OF SOLUBILITY OP A CLAY LOAM TREATED WITH 

 SALTS AND THEN WASHED UNTIL ALL THE FREE SOLUBLE SALTS WERE ELIM- 

 INATED. RATIO OP SOIL TO WATER WAS ABOUT 1 TO .70 AND MIXTURE MAIN- 

 TAINED AT ROOM TEMPERATURE. FIGURES REPRESENT FREEZING POINT 

 DEPRESSION. 



TABLE 4.— RATE AND EXTENT OP SOLUBILITY OP A DARK BROWN SILT LOAM 

 TREATED WITH SALT AND THEN WASHED UNTIL ALL FREE SOLUBLE SALTS 

 WERE ELIMINATED. RATIO OP SOIL TO WATER WAS ABOUT 1 TO .70 AND MIX- 

 TURE MAINTAINED AT ROOM TEMPERATURE. FIGURES REPRESENT FREEZING 

 POINT DEPRESSION. 



Treatment. 



Days. 



Ca(N03)2. . 



NaNOs 



KNO3 



KCl 



K2SO4 



(NH4)2S04. 



MgS04.... 

 CaH4(P04)2 

 KH2PO4... 

 NaCiHsGs . 

 Check 



120 



C° 



.060 



.089 



.087 



.082 



.095 



.080 



. oos 



.055 

 .059 

 .110 

 .051 



