Soils 



Seven soil associations (Figures 2 and 3) occur in the study 

 area. The following is a brief description of each (Southard 

 1973) : 



BA - Badlands. Dominantly rough, gullied land along major 

 streams, principally the Missouri River Breaks. They 

 are used primarily for grazing. 



BSV - Bearpaw-Sprole-Vida Association. These are dark, 



moderately fine-textured soils on continental glacial 

 till. The compact substratum in many places may re- 

 strict root and water penetration. They are used pri- 

 marily for grain and hay production. 



DJU - Danvers-Judith-Utica Association. These are dark, 



medium-textured soils underlain by gravel. They are 

 used principally for small grain production. 



JS - Joplin-Scobey Association. These are soils on glacial 

 till. They occur on the undulating glacial till plain 

 of northern Montana and are used mainly for grain pro- 

 duction . 



LP - Lismas-Pierre . These are clay soils over shale and the 

 Pierre soils are deeper than the Lismas soils. They 

 are used mainly for range. 



SBW - Spring Creek-Blaine-Woodhurs t Association. This asso- 

 ciation is confined to the Bearpaw Mountains. It is 

 associated with the igneous rocks that form the high- 

 lands and is used for range and timber production. 



SC - Spring Creek-Cowood Association. This association is 

 confined to the Highwood mountains and is used for 

 small grain, range and timber production. 



Vegetation 



Payne (1973) describes six vegetative rangeland types in the 

 study area (Figures 4 and 5) . They are the foothill grassland, 

 northern grassland, Teton River-Judith Basin grassland, central 

 grassland, Missouri Breaks scrub pine and undifferentiated stream 

 and lake bottoms. The following is a brief description of each 

 type. 



