The land under experiment is divided into three sections Food for 

 and each crop is grown every season. Each section is sub-di- 

 vided into plots of one-tenth acre each, every third plot being 95 

 left continuously without fertilizer or manure, while the 

 intervening plots have received different combinations of fer- 

 tilizing materials, the 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 application to potatoes, has 

 increased the wheat yield by five bushels. When to this appli- 

 cation, 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 pot- 

 ash 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 38^4 

 bushels per acre for the first half of the ten-year period, and 

 42^2 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 accom- 

 plish 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 



