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• <br />7. Las-Glendive Association <br />Soda of the flood pla~nF m:d lou• terraces <br />This nssociatimt Deco lies the bottom (ands end terraces <br />iu the caller of the Aransas Ricer and along its u•ibu- <br />tnries (fig. B, p. 8). .host. of the as_cociat ion is near]}- level. <br />The soils eonstst of alluvial materials that care ex- <br />tremely in feature, depth, and drainage. These soils <br />range from sand and grace] to elec. <br />The Las and Gleudn-e soils are dominant in this as- <br />sociation, and there are smaller acreages of Havre, <br />liortunan, Las Auimns, Lincoln, and Rocky Ford soils. <br />The Lns and Las Animas soils occur on the flood plains <br />end normally here n moderetelc hilt or high cater <br />table. The salinity of these soils canes. The Lns soils <br />hate a clay loam surface layer and a clay loam to clay <br />subsoil. Although Las soils ere normally effected by <br />salt and a high eater table, they are farmed intensively <br />under irriggation in areas that hate. been drained. Some <br />Las soils, hoscecer, are difficult to drain because they are <br />clacey. Las Animas soils at•e stratified, sandy, and if <br />drained, are eery droughts. Thep are used mainly for <br />range consisting of native grasses. <br />The Glendise, Havre, ]iornman, Lincoln, and Rocln• <br />Fm•d soils are cell drained to excessicelp drained. The <br />Glendise and lioruman soils nre sands and base a ]oe <br />moisiwre-holding cepacitp, but the}- are cultisnted wider <br />irrigation. The sut•face lacer of the lion~mnn soils is <br />deeper than that of the Glendise soils. The Havre and <br />Rocks Ford soils nre lime and medium textured. The <br />Havre soils occur on lon terraces and pace a thin ]Dams <br />sm•face layer and a subsoil that is strntified eith sands <br />material. The Rocky Fw•d soils hate a thick, moder- <br />atel}• fine textured surface leper that consists of material <br />brought in by irrigation mater. The Lincoln soils occur <br />along the stream channels and are likely to be flooded <br />frequently. Thep are sere sandy and grnsellc and in <br />mint wrens are covered eith grasses, tamarisk, and cot- <br />toueood Uees. <br />The Las. Glendise, Havre• lioruman, and Rocky Ford <br />soils produce all crops suited to the area, inclndin~ <br />alfalfa. beers, cm•u, sm~lnuu- small grains, onions, and <br />melons. The principal problems of management are <br />handling irrigation enter. maintaining fertility, reducing <br />siltation, improsing drainage, end correcting salinity. <br />~ a~niat i v <br />SOILS DESCRIPTION <br />