CHAPTER XXXIV 



CROPS 



420. Plants that arc grown by man for his uses constitute 

 a crop. The term is commonly used for the product of a 

 field, but is just as applicable to the product of a planted or 

 managed forest or of a garden or a greenhouse. Thus we may 

 speak of a crop of wheat, of rye, of hemp, of pine timber, of 

 celery, of roses 

 or violets, of 

 mushrooms. 



421. Crops 

 may be distin- 

 guished into four 

 groups: (1) those 

 grown for hum an 

 food or medicine 

 or condiments, 

 as rice, potatoes, 

 strawberries; (2) 

 those grown to 

 provide materials 

 for .shelter and 

 clothing, and for 

 use in the manu- 

 facturing arts, as 



timber Ontton 4 ^ 6 ' Two crops growing together — outs and peas for forage. 



flax, rubber; (3) those grown to satisfy the artistic impulses, 

 as roses; (4) those grown for food of domestic animals, as grass 

 and clover. Another division, and one followed in a general 

 way in colleges of agriculture, is into field crops and horti- 

 (249) 



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