The gain from the use of Nitrate is about ij per cent, 

 as compared with the plot not fertilized with Nitrate of 

 Soda. In 1901 the results were 300 pounds per acre for 

 the unfertilized soil, 520 pounds for plot 3, and 980 pounds 

 for plot 4. The average for the four years shows a gain 

 over the unfertilized soil of 204 per cent for plot 3, and 

 320 per cent for plot 4. Beets were planted in 1898, but 

 were a failure. Sweet Potatoes were planted each of the 

 years under examination, and the crop yields were fair, the 

 soil being naturally suitable to the crop. The following 

 table shows the crop yields in pounds per acre. 



The gain of plot 3 over the unfertilized soil was very 

 large, and the addition of 250 pounds of Nitrate of Soda 

 increased the crop of plot 3 nearly 79 per cent. 



Food for 

 Plants 



m 



(Plot 7.) Corn. No fertilizer. 



