32 



The Bulletin, 



the acid phosphate was nearly ten bushels more per acre than from 

 the rock. However, in the case of plats 4 and 5 the yield from 

 rock and manure and from acid phosphate and manure were prac- 



Plate 7.— Corn Crop on Plat 4, Field D, Buncombe Test Farm, 1910. Fertilized with Acid 

 Phosphate and Stable Manure. Yield 57.7 Bushels. 



tically the same. The gain was greater for the rock and manure 

 as its check plat 6 yielded less than plat 3 which is the check for 

 the acid phosphate and manure plat. In the case of plats 7 and 8 

 the acid phosphate gave a larger yield than the ground rock. This is 



