PLATE IV. 



ih' 



13 



VAN/LLIN 9 GRAMS 



NO TREATMENT 



\ 



1S 



VANILLIN 9 GRAMS 

 KAINITE * 5 GRAMS 

 PHOSPHATE 4 5 



:.^>2fe 



VANILLIN g GRAMS 

 KAINITE 4 5 GRAMS 

 PHOSPHATE 4 S 



NITRATE 4 5 



Fig. 1. Immediate effect on oats of vanillin applied alone and 

 in connection with fertilizers. 



CHECK 



39 



, ', r.pr , ■■ 1^ '-urp 



PHOSPHATE .1 5 

 NITRATE 4 S 



.CNil^ N 9 -.SAMj 



KAINfTE 4 S GRAMS 



OHOSPWATE A 5 

 NITR&TE . i 



-. -opfcj- *< P c fJ 



PREVIOUS CROP- 

 >&NtLLIN 4 S GRAMS 



KA1N'.TE 4 5 GB»MS 



PHOSPHATE 4 S 



Fig. 2. Hesidiinl efrecl on c in of vanillin to the previous, 

 croj) of oats. 



