102 THE CULTURE OF FARM CROPS. 



is given here and will be frequently referred to hereafter. 

 The organic matter is separated from the ash, and water r 

 which are also given, and into two principal divisions, viz: 

 that into which nitrogen chiefly enters, and which are com- 

 monly referred to as nitrogenous matter; or albuminoids or 

 protein compounds; and that commonly called carbo-hy- 

 drates; the former consisting of carbon; oxygen; hydrogen 

 and nitrogen ; and the latter of carbon, oxygen and hydro- 

 gen. These are often distinguished also as non-nitrogen- 

 ous. 



COMPOSITION OF AGRICULTURAL PRODUCTS. 



Carbon & Hydro- 

 gen compounds. 



HAY. 



Hungarian Grass 18.4 5.7 10.8 29.4 38.5 2.2, 



