The Bulletin. < 



the applications, the results being quite uniform in this regard and 

 the averages, after paying for the fertilizer, showed the following net 



profits : 



200 pounds of fertilizer per acre gave a profit of $16.00; 



400 pounds of fertilizer per acre gave a profit of 27.G1 ; 



600 pounds of fertilizer per acre gave a profit of 32.30; 



800 pounds of fertilizer per acre gave a profit of 33.84 ; 



1,000 pounds of fertilizer per acre gave a profit of 36.86. 



Putting this in a slightly different way, the first 200 pounds of 

 fertilizer yielded a net profit (after paying for cost of fertilizer) of 

 $8 for each 100 pounds of fertilizer ; the application of 400 pounds 

 yielded $6.70 per 100 pounds; 600 pounds yielded $5.38 per 100 

 pounds; 800 pounds yielded $4.23 per 100 pounds, and 1,000 pounds 

 yielded a profit of $3.69 per 100 pounds of fertilizer. 



9. Comparisons of dried blood and nitrate of soda as sources of 

 nitrogen show no special advantage one over the other in the produc- 

 tion of cotton on this soil. In the tests nitrate of soda was applied 

 one-half at planting and one-half about July first, on one plat ; one- 

 half was applied about July first, the other half of the nitrogen com- 

 ing from dried blood, which was applied before planting, on another 

 plat, and on a third plat nitrate of soda furnished one-fifth of the 

 nitrogen, the balance coming from dried blood, all being applied be- 

 fore planting. The blood was applied one-half at planting and one- 

 half about July first on one plat ; one-half at planting, the rest of the 

 nitroa-en comine- from nitrate of soda which was applied July first on 

 another plat, and on a third plat four-fifths of the nitrogen was sup- 

 plied by blood and one-fifth by nitrate of soda. The most economical 

 method of application and the one which yielded as large profits as 

 any, is to put all of the fertilizer in the drill before planting, using 

 either all blood or part blood and part nitrate of soda. It is possible 

 that nitrate of soda as the sole source of nitrogen, put out before 

 planting, will give as good results as where a part of the nitrogen 

 comes from blood ; but this was not tested. 



10. When 400 pounds of fertilizer were applied each in the drill 

 before planting, broadcast before planting, and divided into two equal 

 parts, one-half being applied in the drill before planting and the other 

 half as a side dressing about July first, the broadcast application 

 yielded about two-thirds the increased yield and profit that the other 



