DRY-FARMING 

 THE COLUMBIA BASIN UPLANDS 



DuEiNG the past few years there has 

 been a rapid development in dry-farming 

 in Idaho, Oregon, and Washington or in 

 other words on the wheat lands of the 

 Colimibia Basin. This region is almost 

 entirely sm*rounded by mountains. The 

 Cascade Momitains lie to the west; the 

 Bitter Root and Coeur d'Alene Moun- 

 tains to the east; the Okanogan High- 

 lands to the north; and the Blue 

 Mountains to the southeast. The eleva- 

 tion varies from a few hundred feet along 

 the Columbia to as much as 3000 feet in 

 the eastern portion of this region; while 

 the average annual rainfall varies from 

 6 to 24 inches. Near the Columbia 

 River, where the rainfall is lighter, the 

 dry season extends from March until 

 October. Near the Blue and Bitter Root 

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