4 N. H. AGR. EXPERIMENT STATION [Bulletin 283 

 CONFORMITY TO GUARANTEE 



The total amount of nitrogen, available phosphoric 

 acid and potash guaranteed in the 82, complete brands 

 averaged 21.93 per cent. The amount found by analy- 

 sis was 22.59 per cent. The manufacturers, therefore, 

 furnished on the average 0.66 per cent more than they 

 guaranteed. The total amount furnished was less than 

 the total amount guaranteed in 12 brands. The great- 

 est deficiency, however, was only 0.57 per cent. The 

 average of the other 11 deficiencies was only 0.24 per 

 cent. No brand was found deficient in all three consti- 

 tuents. Seven brands were deficient in two of the 

 three constituents, two in nitrogen and available phos- 

 phoric acid, and five in nitrogen and potash. 



Twenty brands were found to contain less than the 

 guaranteed amount of nitrogen. The gi^eatest defici- 

 ency was 0.29 per cent. The average of the other 19 

 nitrogen deficiencies was 0.14 per cent. 



Seven brands failed to meet the guarantee in avail- 

 able phosphoric acid. One brand was deficient 1.13 

 per cent. The average of the other six deficiencies was 

 0.41 per cent. 



Seventeen brands contained less potash than the 

 guarantee. The greatest deficiency was 0.59 per cent. 

 The average of the other 16 potash deficiencies was 0.29 



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 

 arranged alphabetically. The brand name is listed al- 

 phabetically or numerically by formula under the manu- 

 facturer. 



