EXPERIMKNT STATION BULLETINS. 



GS5 



TABI.K 1. — RATE AND EXTP^NT OF SOLUBILITY OP WISCONSIN SUPERIOR CLAY 

 TREATED WITH SALTS AND THEN WASHED UNTIL ALL FREE SOLUBLE SALTS 

 WERE ELIMINATED. RATIO OF 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>... 

 KHoPO,..., 

 NaCoHaOe.. 

 Check 



82 



0° 



.0.30 



.072 



.052 



.050 



.045 



.074 



.035 



.035 



.037 



.090 



.023 



TABLE 2. — RATE AND EXTENT OF SOLUBILITY OF A CLAY LOAM TREATED WITH 

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

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

 TAINED AT ROOM TEMPERATURE. FIGURES REPRESENT FREEZING POINT 

 DEPRESSION. 



Treatment. 



Days. 



("a(N0s)2.. 

 NaNO.i. . . . 



KNO.-, 



KCl 



]V2S04 



(NH4)2S04. 



MgS04..-.. 

 CaH4(P04)2 

 KH2PO4... 

 NaC«H302. . 

 Check 



102 



C° 



.03.5 



.092 



. 055 



.075 



.066 



.075 



.070 



.026 



.051 



.110 



.040 



