McLean soils are on slightly lower landscape positions and have cracks that remain open less than 150 cumulative days during most years. Randall soils are on slightly lower landscape positions and have aquic moisture conditions and cracks that remain open 90 or more cumulative days during most years. Arch, Pep, and Portales soils are on similar or slightly higher landscape positions and have 18 to 35 percent clay in the particle-size control section. Drake soils are on eolian dunes and have 18 to 35 percent clay in the particle-size control section. Lofton soils are on similar or slightly higher landscape positions and have an argillic horizon.
Pullman soils are on the surrounding uplands and have argillic horizons.
Moderately well drained. Very slow permeability. Surface runoff is low on less than 1 percent slopes. These soils pond for very brief to brief periods in some years. Some areas are cultivated to wheat, cotton, or grain sorghum.