56 



EXPERBIEXT STATION. 



[Jan. 



Table showing the Average Composition of the Three Grades of 



Fertilizer. 



What is shown by the above tables : — 



1. That the average ton price for the tliree grades of fertilizer 

 has been nearly $2 more for 1911 than for the previous year, 

 although but little difference is noticed in the average valuation 

 per ton for the two years. 



2. That the percentage excess of the selling price over the 

 valuation in the low-grade fertilizers is about two and one-fourth 

 times more than it is in the high-grade goods, and over one and 

 one-half times more than in the medium-grade fertilizers. 



3. That with a 38 per cent, advance in price over the low- 

 grade fertilizer, the high grade furnishes about 88 per cent, in- 

 crease in commercial value. 



4. The average high-grade fertilizer with a 1G.5 per cent, 

 advance in price over the medium goods, furnishes 47.0 per 

 cent, more plant food and 37.3 per cent, increase in commercial 

 value. 



5. That with a 38 per cent, advance in })ricc over the low- 

 grade fertilizer, the high-grade furnishes more than GO per cent. 

 increase in available plant food. 



G. A ton of the average high-grade fertilizer furnishes 49.2 

 pounds more nitrogen and 94.8 pounds more of actual potash 

 than does a ton of the low-grade goods. 



7. A ton of the average high-grade fertilizer furnishes 30.2 

 [)ounds more nitrogen and 50.4 pounds more potash than does a 

 ton of the medium-grade goods. 



