PLATE II. 



4B 

 CHECK 



28 

 PYRIDINE 9 CC 



30 

 PVRIO'.NE 3 CC 

 /ftlNiTE 4 S GRAMS 



NO TREATMENT 



MAINITE 4 5 CaftMS 

 FKDSPHA.TE 4 5 

 NiTP.VTE 4 5 



Fig. 1. Immediate effect on oats of pyridine applied alone 

 and in connection with fertilizer. 



'|lMiiPPIi!l«.ii"l>. 



30 

 PREVIOUS CWOP- 



p.ainiNP a CC 



v'^^NITE 4 S GRAMS 

 ' I'O'iPHMC 4 5 

 ' ■ ■ ■ -N k & P 



•" rOBN ■ K PS N 



Fig. 2. Residual effect on corn of pyridine applied to the 

 previous crop of oats. 



