FOOD FOR PLANTS 41 



equally as regards the amount of phosphoric acid and 

 potash, so that the effects of supplying or withhold- 

 ing Nitrate of Soda could be easily noted. 



It will be noted that the increased yields are par- 

 ticularly striking in the case of the application of 84 

 and 126 pounds of Nitrate. On plot 2, in 1906, the 

 yield was practically the same as that on plot 1, but 

 this was due to the fact that a few rows in plot 2, 

 owing to the stand on a part of the plot being not so 

 good and possibly on account of some other condi- 

 tion, brought down the average yield per row of that 

 plot. A majority of the rows of that plot, however, 

 undoubtedly gave a better yield than plot No. 1, and 

 it was apparent to the eye that most of this plot was 

 superior to plot No. 1. 



In 1905 it was noted that the cotton grown upon 

 the "No Nitrate" plot rusted quite badly, while 

 plots 3 and 4, upon which an abundance of Nitrate 

 had been applied, were almost immune from rust. 



Experimental tests upon small lots of the seed 

 cotton produced in 1906, showed that the yield of lint 

 was about 34.4 per cent, of the weight of the seed 

 cotton, but no data were secured with regard to the 

 proportionate yield of lint in 1905. Applying these 

 figures to the excess yield of seed cotton by reason 

 of the application of 126 pounds of Nitrate, it will be 

 found that there was an increase of about 238 pounds 

 of lint cotton (690 pounds seed cotton) over the yield 

 on the "No Nitrate" plot in 1905 and an increase of 

 291 pounds lint cotton (846 seed cotton) in 1906. At 

 10 cents per pound, the increased value of the lint 

 cotton yield by applying 126 pounds of Nitrate would 

 be $23.80 for 1905 and $29.10 for 1906, to say nothing 



