112 



EXPERIMENT STATION. 



[Jan. 



Table showing the Average Comfosilion of the Three Grades of Fertilizer. 



Tho al)ove tabic shows : — 



1. That a ton of the average high-grade fertilizer fnrnishes 

 45.6 poniuls more nitrogen and 98.4 pounds more actual potash 

 than does a ton of the low-grade goods. 



2. That a ton of the average high-grade fertilizer furnishes 

 27 pounds more nitrogen and«53.4 pounds more potash than 

 does a ton of the medium-grade goods. 



3. That with a 28.5 per cent, advance in price over the low- 

 grade fertilizer, the high-grade furnishes ahout G5 per cent, 

 increase in available plant food. 



4. That the average high-grade fertilizer with about 15 per 

 cent, advance in price over the medium-grade goods, furnishes 

 over 24 per cent, more plant food and 34 per cent, increase in 

 commercial value. 



5. That tho percentage activity of the total nitrogen is 0.38 

 per cent., and the percentage activity of the organic nitrogen 

 is 8.G5 per cent, more in the high-grade fertilizer than in the 

 low-grade brands. This would indicate the superior quality 

 of plant food in the high-grade brands, which is still another 

 advantage in purchasing the latter class of fertilizer. 



