112 



None of the various treatments afifected the corn 

 crop following the oats. 



Results of Pot Experiments on Cecie Sand. 



The Cecil sand used in the experiments of 1913-1914 

 Avas the poorest of the four soils used in the work. Ap- 

 l)arenth% this soil was so deficient in nitrogen, phos- 

 phorus and potash that only the complete fertilized pot 

 made a very satisfactory growth. Carhon black seemed 

 to be of some benefit to the oats, but did not increase 

 the crop of corn following. Nor was p^^-ogallol of bene- 

 fit to either of the crops. On the other hand, instead of 

 Leing harmful, quinoline more than doubled the yield 

 of the crops, where the larger quantities of the com- 

 pound were used; and, as was the case with pj^idine, 

 was nearly as effective as nitrate of soda. 



In the following table will be found the results ob- 

 tained with Cecil sand: 



Tabic IV. Effect of fertilizers, lime, carbon black, 

 pyrogallol and quinoline on crop yields in 

 Cecil sand. Crops grown in ^-gallon pots 

 in the greenhouse, 1913-1914. 



KIND OF TREATMENT 



c ♦- 



= f! "« 



O 2 £ 



c a 



-- '-4-1 l- 



K rt o 

 E o ^ 



D. 



o 



E C c 



^ o a. 

 o m ^ 



T ^ ^ 



rt 4) -' 



Check, no treatment 



j^itrate of Soda 



Kainit 



Acid Phosphate 



Nitrate, Phosphate, Kainit, each 



Calcium Carbonate 



Carbon Black 



P> rogallol 



P\ ro^allol 



Pyrogallol 



P\ rogallol 



Quinoline 



Quinoline 



Quinoline 



Quinoline 



18.0 



18.0 



18.0 



18.0 



18.0 



18.0 



18.0 



9.0 



4.5 



1.8 



18.0 



9.0 



4.5 



1.8 



16.5 

 54.6 

 33.9 

 89.2 

 190.9 

 24.7 

 35.6 

 16.5 

 20.8 

 16.2 

 22.6 

 31.4 

 60.4 

 49.5 

 30.2 



100 

 276 

 158 

 321 

 790 

 119 

 156 



92 

 108 



95 

 112 

 253 

 279 

 198 

 156 



fhe oat crop was harvested when the plants were 

 out in full head, allowed to become thoroughly air dry, 

 jind was then weighed. 



Eighteen grams of phosphate were added to each pot 



