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. . Drainage in large areas of the bottom land soils of this section of the Red River is inadequate. Many of the darker soil areaS, with bluish-gray and brownish-red mottled subsoils exempliry the poorly drained conditions so pronounced in this reach. Extensive areas of flat, nearly level, or even slightly depressed areas are too poorly drained for farming. In a 1946 Reconnaissance Drainage Survey made by the Department of Agricul- ture, only 23,842 acres in this area were considered as not requiring drain- age under dry farming conditions. Dr~inage needs can be expected to increase with the advent of irrigation. particularly in the heavier subsoil areas. The discontinuous pattern of the areas of suitable soils will probably limit development to relatively small areas served by stream bank pumping. In this section of the Red River Basin, lands totaling 46,900 acreS are considered physically suited to irrigation use. Of this amount, 29,000 acres are of limited utility because of drainage difficulties, but if adequate drainage is provided should prove suitable for development. Also. included in the total figure are 350 acres of lands composed of soils too sandy for surface irrigation methods, but which could be served by high cost sprinkler irrigation methods. The number of acres classed as presently suited is 17,550. T,~ l~nds along the Sulphur, White oak and Cypress, all tributaries to the Red River in the extreme eastern part of the state, show little promise for development, The soils are almost universally clayey, poorly drained and for the m~st part covered with a dense growth of mixed bottom land timber and underbrush. Above 1ake Texoma Because of the highly mineralized waters generally existing in the Red River Basin above Lake Texoma, potential irrigation developments are limited. As already demonstrated in this area, the use of waters of questionable quality on lands other than those ideally suited to irrigated use in all respects should not be considered for sustained irrigation. In view of the questionable quality of waters available, only those lands having such favorable conditions as open readily permeable soils with excel- lent internal drainage and topography such that excess surface and subsoil water is readily remo\~d, are deemed to be suitable. These lands are to be considered such only after detailed qualitative water studies have been made to assure that the amounts am nature of the dissolved solids are such that no residual harmful effects will result over a long period of use. Along the main stem of the Red River, areas shown as suitable, although highly variable, generally consist of calcareous, reddish-brown, light-textured soils, relat~vely deep and possessing light subsoils. Theso cften occur as narrow widely separated bodies, immediately adjacent to the stream, in the area subject to overflow. Development would be largely limited to small scale pump units. Approximately 23,400 acres are classed as suitable. 32