62 



EXPERIMENT STATION. 



[Jan. 



than the low-grade goods and furnish over 34 per cent, greater 

 commercial value. 



6. That the per cent, of nitrogen and jx)tash is very much 

 higher in the high-grade goods than in the low or medium 

 grade. 



7. A ton of the average high-grade fertilizer furnishes about 

 49 pounds more nitrogen, 21/2 pounds more available phos- 

 phoric acid and 91 pounds more actual potash than does a ton 

 of the low-grade goods. 



8. A ton of the average high-grade fertilizer furnishes about 

 31 pounds more nitrogen and about 51 pounds more potash than 

 does a ton of the medium-grade goods. 



Table showing the Comparative Pound Cost, in Cents, of Nitrogen, 

 Potash and Phosphoric Acid in its Various Forms in the Three 

 Grades of Fertilizer. 



This table emphasizes the marked increase in the cost of 

 plant food wherever the low and medium grade fertilizers are 

 purchased. It shows that nitrogen has cost 8.96 cents, avail- 

 able phosphoric acid about 2 cents and potash 1.9 cents per 

 pound more in the average low-grade fertilizer than in the high- 

 grade goods. It shows that nitrogen has cost 5.19 cents, the 

 available phosphoric acid 1.11 cents and the potash 1.10 cents 

 more per pound in the average medium-grade goods than in the 

 average high-grade fertilizer. A comparison with the previous 

 year shows that more high-grade brands have been sold this 

 season than for 1909. There is, however, altogether too large 

 a proportion of low and medium grade brands sold at present 

 (55.33 per cent, of the whole). It is evident that too many 

 purchasers select a fertilizer for its low cost, and without much 



