BARLEY. 93 



Grain. Straw. Total. 



Ammonia 37-45 Ibs. 7*80 Ibs. 45-25 Ibs. 



Phosphoric Acid 10-39 " 4-00 " 14-59 " 



Sulphuric Acid 6-62 " 3-20 " 9-82 " 



Lime 1-81 " 7*40 " 9'21 " 



Magnesia 3-47 " 3-80 " 7-27 " 



Potash 7-59 " 6'00 " 13-59 " 



Silica 2-14 " 45-40 " 47'54 " 



The reader will note the large amount of am- 

 monia required by this crop. This accounts for 

 the nutritive properties of the grain and straw. 

 The amount of phosphoric acid and potash is 

 small comparecl with that of other cereals. 



BARLEY. 



Thirty bushels of barley the estimated pro- 

 duct of an acre of 48 Ibs. to the bushel = 1440 

 Ibs. The straw weighs 2000 Ibs. The grain and 

 straw contain : 



Grain. Straw. Total. 



Ammonia 33-40 Ibs. 7'60 Ibs. 41-00 Ibs. 



Phosphoric Acid. 9'64 " 5-40 " 15-04 " 



Sulphuric Acid... 1-73 " 4-40 " 6'13 " 



Lime -72" 8-80" 9-52" 



Magnesia 2-44 " 2-80 " 5-24 " 



Potash G-33 " 25-80 << 32-13 " 



Silica 7-63" 68-80" 76-43" 



Oat and barley straw are good manures, as 

 they are rich sources of nitrogen, containing, as 

 they do, a large percentage of ammonia. From 

 this cause also, they make good fodder for cattle. 

 Only a small amount of phosphoric acid and pot- 

 ash is required for these straws, while the amount 



