10 N. H. AGE. EXPERIMENT STATION [Bulletin 225 



PHOSPHORIC ACID DEFICIENCIES. 



Four brands of sixteen per cent acid phosphate were 

 analyzed and found to meet the guarantee. Of ninety- 

 four other brands guaranteed to contain phosphoric acid, 

 eight failed to meet the guarantee in full, four of 

 them failing by less than one-fourth per cent. Five 

 brands were below in available phosphoric acid, and four 

 below in total phosphoric acid. Only one brand was be- 

 low guarantee in both total and available phosphoric 

 acid. A deficiency of one per cent in available phos- 

 phoric acid is equivalent to about one dollar per ton. 



POTASH DEFICIENCIES. 



One brand of muriate of potash was analyzed and found 

 to meet its guarantee. Of eighty-seven other brands guar- 

 anteed to contain potash in amounts varying from 1.30 

 per cent to 20.00 per cent, twelve failed to meet the guar- 

 antee in full. Three brands were deficient by less than 

 one-fourth per cent. Four were deficient by more than 

 one-fourth per cent but less than one-half per cent. Four 

 were deficient by more than one-half per cent but less 

 than three-fourths per cent. One was deficient by nearly 

 a full per cent. A potash deficiency of one per cent rep- 

 resents a deficiency of about one dollar 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 numer- 

 ically by formula. 



