Estacado and Pullman soils are on surrounding plains and have an argillic horizon. Lofton soils are on similar or slightly higher landscape positions and have an argillic horizon. Very slow permeability. Surface runoff is negligible. These soils pond for very long periods in most years.
Vegetation varies according to amount of water available.
It includes knotgrass, bur ragweed, sedges, spike rushes, smartweed, saltmarsh aster, curly dock, frog-fruit, and bushy knotweed. In areas of standing water longbarb arrowhead, soft-stem bulrush, and southern cattail may be present. Around the margins, where ponding occurs for shorter periods the woody vegetation includes western willow and some cottonwood. The series is of moderate extent. These soils have aquic conditions between 16 and 20 inches of the soil surface in most years.