199 



7. 200 lbs. Same as No. 6. 



8. 100 lbs. per acre in row of 5-5 fert. made in laboratory with 



2 per cent borax. 



9. 200 lbs. Same as No. 8. 



10. 200 lbs. per acre broadcast 5-5 fert. made in laboratory with 

 2 per cent borax. 



Where the fertilizer was applied in the row, the soil was furrowed 

 out and the fertilizer applied, then the corn dropped in the same furrow 

 and covered. The broadcast application was worked in the entire sur- 

 face of the pot two inches deep. Corn was planted October 8, 1917, 

 and the pots were kept uniformly watered in a greenhouse. 



The notes in Table I indicate the results on the test up to January 

 1, 1918. Figures 1 and 2 show the appearance of the corn November 

 26th. 



The results obtained in this pot test show that without doubt the 

 commercial 5-5 fertilizer containing 1.92 per cent borax will injure 

 corn if applied in the row 100 lbs. or more to the acre. Fifty pounds 

 to the acre caused no damage. 



The damage is caused by preventing germination, by bleaching the 

 leaves of the young corn and by stunting or killing the young plant. 

 This injury is identical to that which was noted in the field. 



A 5-5 fertilizer made from kainit and acid phosphate did not bleach 

 leaves or kill the plants when used 100 or 200 pounds in the row. In 

 the 200 lb. application, this fertilizer caused some temporary stunting 

 which later disappeared. 



An artificial 5-5 fertilizer with 2 per cent borax added caused bleach- 

 ing and even worse damage than the commercial sample did. 



When the fertilizer was applied 200 lbs. to the acre broadcast that 

 containing borax caused a slight bleaching but no permanent injury. 



There seems absolutely no question but that 2 per cent borax in a 

 fertilizer when used 100 pounds to the acre in the row will bleach the 

 leaves of the corn plant and cause more or less permanent injury. 



