107 



Table I. Effect of fciiilizcis, lime, i-drboii black, Jjyro- 

 (jallol, couinaiin, vanillin, pi/ridine and 

 quinolinc on crop yields in Cullers Field 

 soil. Crops grown in '2-gallon pais in the 

 greenlwnse, 1913-lUl t. 



KIND OF TREATVIENT 



w c ^ 

 K -^ y 



^ a. 

 ^ o 







Z2 



^ .^ 2 



Check, no treatment 



Nitrate of Soda 



Kainit 



Acid Phospliate 



Nitrate, Kainit, Phosphate, each 



Calcium Carbonate 



Carbon I^lack 



Pyrogallol 



Pyrogallol 



Pyrogallol 



Pyrogallol 



Coumarin 



Coumarin 



Coumarin 



Coumarin 



Vanillin 



Vanillin 



Vanillin 



Vanillin 



Pyridine 



Pyridine 



Pyridine 



Pyridine 



Quinoline 



Quinoline 



Quinoline 



Quinoline 



gr msi 



9.0 



9.9 



9.0 



9.0 



9.0 



9.0 



9.0 



4.5 1 



2.25! 



0.9 



9.0 I 



4.5 I 



2.25' 



0.9 i 



9.0 



4.5 



2.25' 



0.9 I 



9.0 I 



4.5 I 



2.25' 



0.9 i 



9.0 I 



4.5 I 



2.25' 



0.9 



7.6 



30.8 



16.0 



41.9 



79.5 



7.6 



5.0 



13.0 



6.4 



5.7 



17.2 



4.8 



6.2 



22.9 



10.0 



4.8 



5.7 



6.7 



6.9 



25.7 



30.6 



26.4 



30.5 



27.7 



30.8 



5.8 



11.5 



gr ms 

 8.3 

 18.3 

 10.4 

 11.8 

 21.3 

 11.3 

 9.0 

 8.6 

 9.6 

 10.5 

 8.7 

 12.2 

 lost 

 12.7 

 10.2 

 12.0 

 8.5i 

 lost I 

 11.7! 

 17.1 ! 

 13.01 

 9.9 

 12.31 

 25.6 

 11.2 

 11.7 

 12.6 



;r ms 

 15.9 

 49.1 

 26.4 

 53.7 



100.0 

 18.9 

 14.6 

 21.6 

 16.0 

 16.2 

 25.9 

 17.0 



9 



35.6 

 20.2 

 16.8 

 14.2 



9 



18.6 

 42.8 

 43.6 

 36.3 

 42.8 

 63.3 

 41.0 

 17.5 

 24.1 



gr ms 



100' 



308 



172 



337 



634 



119 



01 



13.S 



100 



102 



162 



107 

 o 



224 



127 



105 



89 

 o 



117 



260 



274 



228 



269' 



335. 



258 



110- 



151 



Under the conditions of these tests, this Norfolk sandy 

 loam soil responded well to nitrate of soda and acid 

 phosphate, when oats was the crop grown; kainit was 

 much less beneficial, while lime was not effective. The 

 crop of corn following the oats was most benefited by 

 the residue from the nitrate and from the complete 

 fertilizer. The natural productive power of this soil 

 is very low, as shown by the yields of the two crops. 



It is interesting to note that the application of such 

 materials as lime, carbon black, and pyrogallol have 

 been of little or no benefit to this soil; it is also very 

 interesting that coumarin and vanillin, both of which 



