46 



OREGON FARMER 



summer fallow each alternate year, followed on the Eastern Oregon 

 dry farming lands, accounts for the smaller annual sales per acre in 

 the Columbia Basin and Blue Mountain region. 



SOILS OF OREGON. 



Chief Soil Types in Oregon. 



Silt Loams. . 



Western Oregon 



Eastern Oregon 



Sandy Loams.. 



Western Oregon 



Eastern Oregon..., 



Dark Gray Silt Loams General valley floors. 

 Red Heavy Silt Loams Hill lands. 

 Red Loams Hill lands. 

 Black Loams Lower bottom lands. 

 White Silt Loams Poorly drained valley floor 

 lands. 



(Light Silt Loams Rolling plains or plateau lands. 

 .(Red Loams Hill lands. 

 ] Black Silt Loams Most valley bottom lands. 

 (Heavy Silt Loams Mountain valleys. 



Light Sandy Loams Coast bluffs. 



Gray or Brown Sandy Loams Rivr flood 



plains. 

 Black 



Marsh Soils.. 



Special Types. 



Gravelly Loams River wash areas. 



[Brown Coarse Sandy Loams-^Columbia Basin 

 A river bluffs and tributary river bottoms. 

 (Brown or Gray Medium Sandy Loams Central 

 Oregon rolling plateau lands. 



[Black "Beaver Dam" Old marsh soils Willam- 

 ette Valley. 

 . j Silty, Marsh Mucks Tideland marshes of coast 



I and Columbia River. 



[Raw Peaty Mucks Tideland marshes and Cen- 

 tral Oregon interior marshes. 



"Adobe" Heavy sticky clay soils black, red, 

 gray Southern Oregon and in spots through- 

 out the state. 



"Granitic Soils" Coarse sandy soils yellow, 

 white Southern Oregon. 



"Pumice Soils" White or yellow, coarse pumice 

 and sands Central Oregon towards head of 

 Deschutes River. 



"Alkali Soils" Generally silt loams local areas 

 in Eastern Oregon only. 



Approximate Composition of Some of Chief Oregon Soil Types. 



Granitic". 



17 



27 



I 43 



100 



The greatest factor in the agricultural wealth of any country 

 is the fertility of its soils. Oregon is widely known for the mildness 

 of temperature, ample rainfall and long growing season prevailing 

 in certain of its districts, yet the state is even more fortunate in 



