EXPERIMENT STATION BULLETINS. 



tol 



TABLE 10.— RATE AND EXTENT OF SOLUBILITY OF OHIO SOILS. RATIO OF SOIL TO 

 WATER WAS ABOUT 1 TO .70 AND MIXTURE MAINTAINED AT ROOM TEMPER- 

 ATURE. FIGURES REPRESENT FREEZING POINT DEPRESSION. 



Days. 



Soil No. 1 . . . 

 Soil No. 2... 

 .Soil No. .-J... 

 Solil No. 4. . , 

 Soil No. 5. . 

 Soil No. 6... 

 Soil No. 7... 



Soil No. 8 1 .010 



61 



C" 

 (MO 

 .032 

 .031 

 .020 

 .020 

 .030 

 .033 

 .030 



Soil No. 1. Five year rotation, in corn, unfertilized. 



Soil No. 2. Five year rotation, in corn, plot 2 ; acid pliosphate SO pounds. 



.Soil No. ?>. Five year rotation, iu corn, plot 12 : acid phosphate 160 pounds ; muriate potasli 



SO pound.s ; nitrate soda 80 pounds. 

 Soil No. 4. Five year rotation, in oats, plot 15 ; acid phosphate 160 pounds ; muriate potash 



100 pounds ; dried blood 50 pounds ; nitrate soda 120 pounds. 

 Soil No. 5. Continuous culture, wheat unfertilized. 

 Soil No. 6. Continuous culture, wheat, plot 8 ; acid phosphate 100 pounds, muriate potash 100 



pounds. 

 Soil No. 7. Three year rotation in potatoes ; plot 15 ; acid phosphate 480 pounds, muriate 



potash 300 pounds, nitrate soda .320 pounds. 

 Soil No. S. Three year rotation, in clover, plot No. 15, acid phosphate 480 pounds, muriate 



potash 300 pounds, nitrate soda 320 pounds, on potatoes only. 

 The 5 year rotation consisted of corn, oats, wheat, clover and timothy. The" fertilizers have 

 been applied only on the corn, oats and wheat, but not on the clover and timothy. In addi- 

 tion to the fertilizers stated above the soils have received also applications of lime at different 

 periods. 



TABLE 11.— RATE AND EXTENT OF SOLUBILITY OF ILLINOIS SOILS. R.\TIO OF SOIL 

 TO WATER WAS ABOUT 1 TO .70 AND MIXTURE MAINTAINED AT ROOM TEMPER- 

 ATURE. FIGURES REPRESENT FREEZING POINT DEPRESSION. 



Soil No. 1. 



Soil No. 2. 



Soil No. 3. 



Soil No. 4. 



Soil No. 5. 



Soil No. 6. 



Soil No. 7. 



Sou No. S. 



Plot No. 166. 



Plot No. 169. 



Plot No. 170. 



Plot No. 173. 



Plot No. 202. 

 Plot No. 203. 

 Plot No. 206. 

 Plot No. 207. 



South Farm 



Residue, phosphorus, lime. 



Residue. 



Man-ure, phosphorus, lime. 



Manure. 



Davenport Plots 

 Residue. 

 Manure. 



Residue, phosphorus, lime. 

 Manure, phosphorus, lime. 



