EXPEKIMEXT STATION BULLETINS. 



7or, 



TABLE 14. — RATE AND EXTENT OF SOLUBILITY OF OHIO SOILS AT OPTIMUM 

 MOISTURE CONTENT. KEPT MOSTLY OUTDOORS. FIGURES REPRESENT FREEZ- 

 ING POINT DEPRESSION. 



Days. 



Soil No. 1. 

 Soil No 2, 

 Soil No. 3. 

 Soil No. 4. 

 Soil No. 5 . 

 Soil No. 6. 

 Soil No. 7. 

 Soil No. 8., 



60 



C° 



.027 



.027 



.027 



.027 



.025 



.020 



.02.5 



.026 



Five year rotation, in corn, unfertilized. 



Five year rotation, in corn, plot 2 ; acid phosphate SO pounds. 



Five year rotation, in corn, plot 12 ; acid phosphate 160 pounds ; muriate potash 



SO pounds ; nitrate soda SO pounds. 

 Five year rotation, in oats, plot 15 ; acid phosphate 160 pounds ; muriate potash 



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

 Continuous culture, wheat unfertilized. 

 Continuous culture, wheat, plot 8 ; acid phosphate 100 pounds, muriate potash 



100 pounds. 

 Three year rotation in potatoes ; plot 15 ; acid phosphate 480 pounds ; muriate 



potash 300 pounds, nitrate soda 320 pounds. 

 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 

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

 different periods. 



TABLE 15.— RATE AND EXTENT OF SOLUBILITY OF ILLINOIS SOILS AT OPTIMUM 

 JNIOISTT^RE CONTENT. KEPT MOSTLY OUTDOORS. FIGURES REPRESENT FREEZ- 

 ING POINT DEPRESSION. 



Soil Uo. 1. 



Soil No. 2. 



Soil No. 3. 



Soil No. 4. 



Soil No. 5. 

 Soil No. C. 

 Soil No. 7. 

 Soil No. 8. 



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. 



Manure, phosphorus, lime. 



Manure. 



Davniport Plots 

 Residue. 

 Manure. 



Residue, phosphorus, lime. 

 Manure, phosphorus, lime. 



