4 N. H. AGR. EXPERIMENT STATION [Bulletin 301 



CONFORMITY TO GUARANTEE 



None of the brands was deficient in all of the three 

 guaranteed constituents, nitrogen, available prosphoric 

 acid, and water soluble potash. Fourteen brands were 

 deficient in two of the three constituents, one in nitrogen 

 and available phosphoric acid, 12 in nitrogen and potash, 

 and one in available phosphoric acid and potash. 



Twenty-five brands were found to contain less than 

 the guaranteed amount of nitrogen. The greatest de- 

 ficiency was 0.59 per cent. The average of the other 24 

 nitrogen deficiencies was 0.23 per cent. 



Nine brands failed to meet the guarantee in available 

 phosphoric acid. One brand was deficient 0.89 per cent. 

 The average of the other eight deficiencies was 0.22 per 

 cent. 



Twenty-two brands contained less potash than the 

 guarantee. The greatest deficiency was 3.03 per cent. 

 The average of the other 21 deficiencies was 0.50 per 

 cent. 



In the tabulation of the analyses in the following pages 

 deficiencies of one-fourth of one per cent or more are 

 shown in bold-faced type. The manufacturers are ar- 

 ranged alphabetically. The brand name is listed alpha- 

 betically or numerically by formula under the manu- 

 facturer. 



