20 



The above table shows: 



(1). That on the average the complete mixed fertilizers have 

 cost a little more per ton than for 1912. 



(2). That the average calculated commercial value of plant 

 food in a ton has been 81 cents more than for the previous season. 



(3). That the percentage excess of the selling price over the cal- 

 culated commercial value of plant food in the low grade fertilizers is 

 over three times more than in the high grade goods and about one 

 and one half times more than in the medium gradt fertilizers. 



(4). That with a 28.9 per cent advance in price over the low 

 grade fertilizer, the high grade furnishes about 93.5 per cent increase 

 in commercial plant food value. 



(5). The money difference between the average selling price 

 and the average commercial valuation in the high grade fertilizers 

 is $5.61 less than in the low grade goods. 



Table showing the average chemical composition of the three 

 grades of fertilizers. 



The above table shows: 



(1). That a ton of the average high grade fertilizer furnishes 

 46.6 pounds more nitrogen and 104 pounds more actual potash than 

 does a ton of the low grade goods. 



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

 29.2 pounds more nitrogen and 61.8 pounds more potash than does a 

 ton of the medium grade goods. 



