Biggetty and Iraan soils are dry in the moisture control section for longer periods. Elandco and Port soils are noncalcareous to depths of more than 20 inches. Bippus, Bosque, Gageby, Gowen and Whitesboro are in the fine-loamy family. In addition, Whitesboro soils are moderately well drained. Bergstrom soils are on flood plains and low terraces along major streams.
Surfaces are flat to convex.
Slope gradients are mainly less than 1.0 percent but range up to 3 percent. The soil formed in calcareous silty alluvium. Mean annual rainfall ranges from 32 to 40 inches, and mean annual temperature ranges from 67 to 70 degrees F. Frost free days range form 260 to 290 days, and elevation ranges from 200 to 750 feet. Thornthwaite P-E indices range from 44 to 60. These include the Asa , Miller , Weswood and Yahola series.