RYE. 



91 



Grain. 



Ammonia 34*22 Ibs. 



Phosphoric acid 25*81 



Sulphuric acid 2'90 



Lime -87 



Magnesia 7*83 



Potash 15-08 



Silica... . 2-32 



Stalk and Cob. Total. 



6-00 Ibs. 40-22' Ibs. 

 13-50 



8-40 

 17-70 



9-30 



59-70 

 81-60 



39-31 

 11-30 

 18-57 

 17-13 



74-78 

 83-92 



The reader will notice that Indian corn re- 

 quires much more phosphoric acid and potash 

 than wheat, while the amount of ammonia is 

 only a little more than half as much; conse- 

 quently, its nutritive properties as food are in 

 about the same proportion ; that is, in proportion 

 to the ammonia. Corn stalks contain a large 

 amount of potash and silica, and, when properly 

 prepared as manures, will furnish these elements 

 for other crops. From the comparatively small 

 amount of ammonia required by the corn crop, 

 it can be raised at less cost to the soil than wheat, 

 because ammonia is one of the most costly of the 

 organic elements. 



RYE. 



Thirty bushels the estimated product of an 

 acre of 50 Ibs. to the bushel = 1500 Ibs. ; the 

 same weight as 25 bushels of wheat. This crop 

 requires at least 3000 Ibs. of straw. The grain 

 and straw contain : 

 7 



