GRAIN AND HAY FARMING 



may take ten to fifteen years to begin to real- 

 ize on an apple orchard. 



(3) The products are not easily perish- 

 able, and hence can be held almost 

 indefinitely. The development of the mag- 

 nificent elevator system, based upon the 

 principle that the cereals can be handled 

 like water, greatly simplifies the holding 

 and preservation of these staple products. 



(4) The products are in constant de- 

 mand, and hence they always find a market. 



Agricultural commodities may be divided 

 into three classes, depending upon the area 

 which controls the price of the commodity, 

 as follows: (a) price units world-wide, as 

 wheat, cotton, pork; (b) price units local to 

 large districts products too bulky to ship 

 long distances such as hay, potatoes and 

 apples; (c) price units local to relatively 

 small areas, such as strawberries and green 

 vegetables. It is obvious that the larger the 

 area which controls the price, the more 

 constant will be the demand. 



H3 



