58 Report of the Department of Agronomy of the 



applied at the rate of 200 pounds per acre on corn and wheat, making 

 an application of 400 pounds for each three-year rotation. 



The following table of results has been taken from Ohio Station 

 Bulletin 260. It has been modified in that the increases of stover 

 and straw are omitted for the sake of brevity. One dollar per ton 

 has been added to the cost of the duplicate fertilizer to pay for 

 mixing, and the price of bonemeal has been increased to $25 per ton. 



Table VI. — Comparative Effect of Home-mixed and Factory-mixed 

 Fertilizers: Ohio Experiments. 



Average yearly increase per acre in comparison of factory-mixed with home-mixed 

 fertilizers, cost of fertilizers and net gain for one rotation. 



* 4-8-4 = nitrogen (N) 4 per ct., phosphoric acid (P 2 5 ) 8 per ct., potash (K..O) 

 4 per ct. 



The results of this experiment plainly show that home-mixed 

 fertilizers may be $5 to $10 per ton cheaper than ready-mixed 

 fertilizers showing the same percentages of nitrogen, phosphorus 

 and potassium. Furthermore the home-mixed goods have produced 

 better yields, doubtless due to their being made of better materials. 

 When we consider the difference in net gain as a result of these two 

 facts it is so greatly in favor of home mixing that we are justified 

 in advising the farmer to ovoid, as a rule, the buying of vrixed com- 

 mercial fertilizers. There are probably instances of cooperative buy- 

 ing where a special mixture made up of good materials is obtained 



