This table enables one to compare commercial quota- 

 tions with accuracy. The figures themselves are not quota- 

 tions in any sense of the word, and all the figures of the table 

 refer only to one grade of Nitrate of Soda, namely: that 

 containing 15.65 per cent, of Nitrogen. 



FARMERS' BULLETIN No. 107. 



Prepared in the Office of Experiment Stations, 

 Washington, D. C. 



"Under existing conditions farmers are advised to pur- 

 chase fertilizer materials and to make their own mixtures 

 rather than to purchase mixed or complete special fertilizers. 

 This course is believed to be advisable for two reasons: First, 



