WHEAT. 115 



ly, stable manure is applied directly to the wheat, 

 where wheat forms a part of the rotation. Clover is 

 used in many places as a part of the rotation and 

 with good results. In some localities, potatoes and 

 wheat are grown alternately, large quantities of ma- 

 nure being applied to the potato crop. In some lo- 

 calities clover is sown with the wheat and then plowed 

 under in August, another crop of wheat sown and 

 clover sown again. 



The drilling of a couple of hundred pounds of 

 commercial fertilizers with the wheat is not an un- 

 usual practice in the Eastern States, and the quantity 

 used seems to be increasing, which indicates that 

 farmers believe that they are getting profitable re- 

 turns. Commercial fertilizers are comparatively 

 rarely sown with wheat in the Western States. 



The Experiment Stations of New Jersey, Penn- 

 sylvania, Maryland, Ohio, Kentucky, Indiana and 

 Illinois are among those which have made field tests 

 with the various approved forms of commercial fertil- 

 izers for the production of wheat. The general re- 

 sult at these Stations has been that the increase in 

 yield of wheat produced by the application of the 

 various forms of commercial fei'tilizers has not given 

 a profitable return for money invested, at the price of 

 wheat and of fertilizers during the ten years 1880 to 

 1889. An increase in the price of wheat or a decrease 

 in the price of fertilizers would tend to make their 

 use profitable. 



Of the three single ingredients usually considered 

 valuable in commercial fertilizers, phosphoric acid 

 has generally given the largest increase, and potash 

 the Jeast. A complete fertilizer — that is, one com- 



