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Baca Series <br /> The Baca series consists of deep, well-drained, nearly <br /> level loamy soils that are free of harmful salts. <br /> The stu•face layer is light brownish-gray loam about 5 <br /> inches thick. The intake of water is moderate. <br /> The subsoil, ,which is about 11 inches thick, is dark- <br /> brown clay loam in the upper part and brown silty clay <br /> loam in the lower part.It leas distinct prismatic structure. <br /> The prisms, which are about 1 inch in diameter, crumble <br /> into small aggregates. When exposed by plowing, the ag- <br /> gregates maintain their shape and are not easily eroded. <br /> The subsoil is free of lime except in the lower part. <br /> The underlying material is limy, wind-deposited silty " <br /> clay loam that grades to lilnx clay loam at a depth of about ; <br /> 39 inches. Plant roots easily Penetrate this layer. The <br /> water-holding capacity is good. <br /> Baca soils are moderately fertile.They have good water- <br /> holding capacity and are free of harmful salts. They are <br /> easy to work but,if cultivated,are readily eroded by wind. ; <br /> These soils are used for range or dryland farming.Blue <br /> grama and galieta 6�Te the dominant native grasses. <br /> Representative profile in an area of native shortgrass t <br /> rangeland at the center of sec. 13,T.18 S.,R. 56 W. <br /> A11-0 to 3 inches,light brownlsb-gray (10TR 0/2) loam,dark r <br /> grayish brown (10YR 4/2) when ruoist; weak, thin, <br /> platy structure that breaks to weak,very fine,crumb; <br /> soft when dry, very friable when molst; noncalcar- <br /> cous;abrupt,smooth boundary. <br /> Al2-3 to 5 inches, grayish-brown (lOYR 5/2) silt loam, dark <br /> brown (10YR 4/3) when moist; wenk, medium, platy <br /> structure; slightly hard when dry, very friable when <br /> innlst; uoncateareous; clear, stnuoth bouittlary. <br /> I32t-5 to 10 inches, dark-brown (IOYR 4/3) clay loam, dark <br /> brown (lOYn 3/3) when moist; moderate, medium, <br /> prismatic structure that breaks to moderate, medium, <br /> e ubangulnr blocky; hard when dry, firm when moist; <br /> thin clay films on the surface of soil aggregates; non- <br /> calcareous; gradual, wavy boundary. <br /> 133ca—I0 to 1G inches,Pole-brown (10YR 6/3) silty clay loans, <br /> brown (10YR 5/3) when moist; moderate, medium, <br /> prismatic structure Unit breaks to moderate, medium, <br /> bnbangular blocks; hard when dry, friable when <br /> 4 <br /> r ' <br />