ROOT-KNOT DISEASE OF TOMATOS. 



55 



SUMMARY OF RESULTS * 

 Diseased Subsoils treated with Mineral Acids. 

 Nitric Acid. 



Year. 



Plot 



1. Rate 138 cwt. per acre. 





Before. 



After. 



1915 



X 



> O 



1916 



0 



Nothing applied O 



1917 



0 



Nothing applied X 



Year. 



Plot 2. Rate 69 cwt. per acre. 



1 



i 1915 

 1 1916 

 1917 



1 



Before. After. 



XX >• X 



X Creosote emulsion O 

 0 Nothing XX 



Chromic Acid. 



Year. 



Plot 21. Rate 10 cwt. per acre. 



1915 

 1916 

 1917 



Before. After. 



XX > 0 



O Nothing applied O 

 O Nothing applied 0 



Diseased Subsoils treated with Alkalies. 



Caustic Soda. 



Year. 



Plot 20a. Rate 16 cwt. per acre. 



1915 

 1916 

 I917 



Before. After. 



XXX > xxxx 



XXXX Pot. cyanide X 

 X Sod. cyanide 0 



Year. 



Plot 206. Rate 16 cwt. per acre. 



1915 

 1916 

 1917 



Before. After. 



XXX > XXXX 



XXXX Pot. cyanide O 

 O Nothing O 



Year. Plot 20c. Rate 16 cwt. per acre. 



Before. After. 



I 1915 xxx > xxxx I 



j 1 91 6 XXXX Pot. cyanide O 

 1 91 7 O Nothing O 



Diseased Subsoils treated with Mineral Salts. 

 Potassium Cyanide. 



Year. 



Plot 24. 



Rate 10 cwt. per 



icre. 





Before. 





After. 



1915 



XX 



> 



O 



1916 



0 



Nothing 



O 



1917 



0 



Nothing 



O 



Year. 



Plot 41. 



Rate 9 cwt. per acre. 





Before. 



After. 



! 1915 



XXXX 



> O 



1916 



' 0 



Nothing Tr 



1917 



Tr 



Cresyiic acid O 



* In these summaries the arrow indicates the year in which the substance 

 under review was tried, and the results of that year only are significant. 



