Lomalta soils have grayish colors associated with wetness. Olmito soils do not have slickensides. Moderately well drained. Very slow permeability. Runoff is low.
Some areas are subject to rare flooding.
Mostly used for irrigated cropland except in areas near the coast that are saline. Crops grown are cotton, grain sorghum, and a wide variety of cool season vegetables. In pasture the main grasses are coastal bermudagrass, African star, and angleton grass. The woody vegetation is mostly mesquite, retama, huisache, and spiny hackberry. Occurs principally on stream terraces and deltas along the lower reaches of the Rio Grande River and its major tributaries in southern Texas.