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SOIL SURVEY OF TARRANT COUNTY, TEXAS. 885 foot section, but on eroded slopes it may be reached at 18 inches. Chert fragments are present here and there on the surface, and lime concretions are found locally on the surface and through the soil section. This type occurs in the Black Prairie in small areas from Arlington and Mansfield eastward, and on the Grapevine Prairie. The largest area lies southwest of Grapevine. e Houston clay is derived from the Eagleford shales. The type ccupies rolling country and the slopes descending from the Houston black clay to the stream bottoms. Erosion has been especially active in some areas, leaving gullies of considerable length and depth. The drainage of the type is good. The type is adapted to the same general crops as the Houston black clay and produces about the same yields. Some cotton root rot was noted. The general suggestions made for handling the Houston black clay apply to this clay type., This land sells for $175 to $250 an acre. KIRVIN FINE SANDY LOAM. The Kirvin fine sandy loam is a light reddish brown to brown fine sand to fine sandy loam passing into reddish-brown fine sand to fine sandy loam, and underlain at depths of 5 to 15 inches by red clay, which usually shows mottlings of yellow at depths of 18 to 20 inches, the yellow usually increasing with depth. In some places in the lower subsoil the yellow ranges to yellowish gray. Although there is enough fine sand or red to yellow crumbly iron oxide material in the subsoil in places to impart a degree of friability, the typical subsoil is moderately stiff to stiff. Here and there, especially on ridges and steep slopes, the subsoil is brick red to depths of 3 feet or more. Some of the hilltops and ridge crests are decidedly gravelly, small patches having so much ferruginous rock, consisting mainly of platy sandstone fragments and concretions, as to interfere somewhat with cultivation. Some of the lower slopes and flat areas are very gravelly. As a rule, however, this type does not contain enough gravel to be classed as a gravelly fine sandy loam. On some of the hills and ridges the ferruginous rock is Present through the 3-foot section, and occasional large fragments are present on the surface. Neither soil nor subsoil effervesce with hydrochloric acid. The Kirvin fine sandy loam is the dominating type of the East Cross Timbers region in'Tarrant County, occupying one-half or more of its total area in the county. It is derived from the rocks of the Woodbine formation. The type occurs on ridges and hills with gentle to moderate slopes. The prevailing topography is undulating to rolling and slightly hilly. The drainage is good to excessive in the more rolling areas, where the run-off in places is sufficient to cause destructive erosion. The greater part of this type is under cultivation. The unimproved part supports a growth consisting chiefly of post oak and blackjack oak with some sumac and elm in places. Bermuda grass and broom sedge supply some pasturage. Corn and cotton are the chief crops. Oats and wheat are grown on small acreages. Sweet potatoes and peanuts do well on the type,
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Hawker, H. W. (Herman William); Gearreald, T. N. (Tull Neal) & Beck, M. W. (Miles Walter).Soil Survey of Tarrant County, Texas,
book,
1924;
Washington D.C..
(https://texashistory.unt.edu/ark:/67531/metapth19834/m1/36/:
accessed April 19, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu;
crediting UNT Libraries Government Documents Department.