Food for or manure, while the intervening plots have received 

 __^_! different combinations of fertilizing materials, the 

 132 fertilizers being divided between the potato and wheat 

 crops. 



The average yield of wheat in this test for the last 

 ten years has been twenty -five bushels per acre on the 

 unfertilized land. The application of 160 pounds of 

 acid phosphate per acre to wheat, following a like appli- 

 cation to potatoes, has increased the wheat yield by 

 five bushels. When to this application, 100 pounds of 

 muriate of potash was added for each crop, the yield 

 of wheat was increased by seven bushels, while the 

 use of a complete fertilizer, made up of 160 pounds of 

 acid phosphate, 100 pounds of muriate of potash and 

 the equivalent of 160 pounds of Nitrate of Soda for each 

 crop, has increased the total yield of wheat to more 

 than forty bushels per acre for the ten-year average. 



The increase in the potato crop in each of these 

 cases has more than paid for the fertilizer, leaving the 

 increase in wheat as net gain, a gain which has been 

 further augmented by a considerable increase in the 

 yield of clover. 



Not only has the yield been maintained at a high 

 point, but it seems to be steadily increasing; the average 

 yield for the three plots which receive the combination 

 given, and which are located in different parts of the 

 field, being 38J4 bushels per acre for the first half of 

 the ten-year period, and 42^ bushels per acre for the 

 second half. 



It has therefore been possible to produce forty 

 bushels of wheat per acre in Ohio as a ten-year average, 

 and to accomplish this result by a method which has 

 much more than paid the cost. 



It is the general observation of farmers, that wheat 

 does exceptionally well when it follows potatoes, and 

 this fact in part accounts for the large yields obtained 

 in this experiment. The fact that the land was in good 

 condition to start with — part of it having been cleared 

 from the forest for purposes of this test, must also be 

 borne in mind. But on another of the Station's Wayne 

 county farms, one which had been reduced to a very 

 low state of fertility by long continued and exhaustive 



