8 N. H. AGR. EXPERIMENT STATION [Bulletin 231 



but less than three-fourths per cent. Two were more than 

 three-fourths per cent below but less than one per cent. 

 The five brands of acid phosphate analyzed this year aver- 

 aged to contain 16.25 per cent available phosphoric acid and 

 sold at an average price of $19.75 per ton. A deficiency 

 of one per cent available phosphoric acid is equivalent, 

 therefore, to about $1.20 per ton. 



POTASH DEFICIENCIES 



One hundred and fourteen brands were guaranteed to 

 contain potash in amounts varying from 1.30 per cent to 

 sixteen per cent. Twenty-four failed to meet the guaran- 

 tees. Ten were deficient by less than one-fourth per cent. 

 Seven were below by more than one-fourth per cent but 

 less than one-half per cent. Five were below by more than 

 one-half per cent but less than three-fourths per cent. Two 

 were below more than three-fourths per cent but less than 

 one per cent. A deficiency of one per cent potash repre- 

 sents a decrease in the commercial value of about one dol- 

 lar per ton. 



In the tabulation of the analyses in the following pages 

 deficiencies of two-tenths of one per cent or more are shown 

 in Italics. The names of the manufacturers are arranged 

 alphabetically, and under the manufacturer the different 

 brands are arranged alphabetically or numerically by 

 formula. The nitrogen determinations were made by Mr. 

 Gordon P. Percival, and assistance was rendered in mak- 

 ing the phosphoric acid determinations by Mr. Frank S. 

 Schlenker. 



