New York Acricultural Experiment Station. 205 



In 120 brands of complete fertilizers, the amount of available 

 phosphoric acid found was above the amount guaranteed, the 

 excess varying from 0.02 to 4.33 per cent and averaging one per 

 cent. 



In 52 brands, the available phosphoric acid M'as below the 

 guaranteed amount, the deficiency varying from 0.01 to 2.10 per 

 cent and averaging 0.46 per cent. In 25 of these cases, the de- 

 ficiency was below 0.25 per cent; in 10 cases, it was above 0.25 

 and below 0,50 per cent; in 12 cases it was above 0.50 

 below one per cent; in one case, it was above two and below 

 three per cent. 



4. Potash. The complete fertilizers contained potash varyiug 

 in amount from 0.36 to 14.65 per cent and averaging 4.16 per 

 cent. The average amount of potash found by the Station 

 analysis exceeded the average amount guaranteed by 0.18 per 

 cent, the average guaranteed being 3.98 per cent, and the average 

 found being 4.16 per cent. 



In 131 brands of complete fertilizers, the amount of potash 

 found was above the amount guaranteed, the excess varying 

 from 0,02 to 2.35 per cent and averaging 0.52 per cent. 



In 43 brands, the potash was below the guaranteed amount, 

 the deficiency varying from 0.01 to 3.98 per cent and averaging 

 0.60 per cent. In 20 of these cases, the deficiency was below 

 0.25 per cent; in eight cases, it was above 0.25 and below 0.50 

 per cent; in six cases, it was above 0.50 and below one per 

 cent; in six cases, it was above one and below two per cent; 

 in two cases, it was above two and below three per cent; and in 

 one case it was above three and below four per cent. 



In nine cases, the 174 biands of complete fertilizers contained 

 the potash in the form of sulphate free from an excess of chlo- 

 rides. 



5. The retail selling price of the complete fertilizers varied 

 from |20 to |51 a ton and averaged $30.25. The retail cost of 

 the separate ingredients unmized was $21.22, or $9.03 less than 

 the selling price. 



