TABLE II. 



Potato Scab (Oospora Scabies) in Silica S\nd Pot Cultures. 



137 



Treatment of Soil 



NPKzSO, 



NPKCl 



NPK2SO, + Na.SO, 



NPK2SO. + NaCl 



N P K.SOj + sulfur 



XPKC1 + sulfur 



N P K2SO, + NajSO, + sulfur. 

 N P K2SO4 + NaCl + sulfur. . . 



Pot No. 



Per Cent, 

 of Scab. 



N = 7 gr. dried blood plus 6.7 gr. nitrate soda per pot. 



P = 5.1 gr. di-calcic phosphate per pot. 



KjSO) = 3.6 gr. sulfate of potash per pot. 



KCl = .3.6 gr. chloride of potash per pot. 



Na2S04 = 3.4 gr. sulfate of soda per pot. 



NaCl = 2.8 gr. chloride of soda per pot. 



Sulfur = 8 gr. per pot or approximately 360 lbs. per acre. 



All pots had a treatment of 100 gr. calcium carbonate per pot. 



Early Ohio potatoe'^ treated with formalin were planted. 



