PRACTICAL AGRICULTURE. 16 



2d " Grain-crop, as wheat, barley, or oats. 

 3d " Sown grasses. 

 4th " Grain-crop. 



In this course, we observe that each exhausting crop 

 alternates with a restorative one ; and that, in each 

 year, one-half of the farm is under exhausting, and one- 

 half under restorative, crops. 



CULTIVATION OF PLANTS. 



I. PLANTS CULTIVATED FOR THEIR SEEDS. 



/. Cereal Grasses. 



Of the cereal grasses, those most commonly cultivated 

 in this country are wheat, rye, barley, and oats. 



The seeds of these cereal grasses may be sown either 

 previously to winter or in spring ; wheat and rye are, for 

 the most part, sown before winter ; barley and oats gen- 

 erally in the spring. 



In the end of summer, when the green color of the 

 stem has nearly disappeared, and when the grain, hav- 

 ing changed from its milky state, has somewhat har- 

 dened, it will be proper to commence the process of 

 reaping. 



WHEAT. 



The following species may be enumerated as admit-r 

 ting of cultivation for their seeds : 



Summer Wheat. 



Winter or Lammas Wheat. 



Compact Wheat. 



Egyptian Wheat. 



Turgid Wheat. 



Dark-spiked Wheat. 



Barley-like Wheat, 



Far. 



Spelt. 



