While the word fertilizer does not appear in all the above titles, no publica- 

 tion is included which does not discuss the use of fertilizer. 



CONFORMITY TO GUARANTEE 



The chemical analyses were made by the methods of the Association of 

 Official Agricultural Chemists. Forty-five of the 70 brands analyzed equaled 

 or exceeded the manufacturer's guarantee. One brand failed to meet the guaran- 

 tee in all of the three constituents, total nitrogen, available phosphoric acid, and 

 water-soluble potash. Nine brands were below guarantee in two of the three 

 constituents. Fifteen brands failed to meet the guarantee in only one constituent. 

 Six brands were guaranteed to contain magnesium oxide. None failed to meet 

 the gfuarantee. 



In the tabulation of the analyses in the following pages deficiencies of one- 

 fourth of one per cent or more are shown in red bold-face type. The manufac- 

 turers are arranged alphabetically. The brand name is listed alphabetically, or 

 numerically by formula, under the manufacturer. 



