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<br />Baca Sel•ies <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 inttike of tr•ater is moderate. <br />The subsoil, tehich 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 has distinct prismatic structure. <br />The prisms, which are about 1 inch in diameter, crumble <br />into small apgregatcs. When exposed by plowing, the ag- <br />gregates maln'tnln their shape and are not easily eroded. ; <br />The subsoil is free of lime except in the lower part. ~ <br />Tho underlying material is limy, wind-deposited silty " <br />clay loam that grades to limy clay loam at a depth of about i;. <br />32 inches. Plant roots easily penetrate this layer. The <br />water-holding capacity is good. <br />Baca soils are moderately fertile. Tlley have good water- <br />holding capacity and are free of harmful salts. They are ' <br />oasy to work but, if cultivated, are readily eroded by wind. ; <br />These soils are used for range or dryland farming. Blue <br />gramn and galleta are the dominant native grasses. <br />Represent<titive profile in an area of native shortgrass t <br />rangeland at tho center of sec. 13, T. 18 S., R. 56 ~V. , <br />X111-0 to 3 inches, light brownish-gray (lOYR G/2) loam, dark <br />graylsU bron•n (lOYR 4/2) when moist; weal:, thin, <br />platy structure that breaks to n'enl:, very fine, crumb; <br />soft n•hea dry, very friable when moist; noocalcar <br />eons ;abrupt, smooth boundary. <br />A12-3 to 5 lnchc5, grayisU-brown (lOYR 5/:1 silt loom, dark <br />Uruwu (lUYlt 9/:i) trheu woist; wenL-, mediuut, platy <br />structure; slightly lmrd when dry, very friable when <br />waist; uoucalcat•eotts; clear, suwoth bouudm'y. <br />B^_t-5 to 10 inches, dark-brown (lOTR 4/3) clay loam, dark <br />brown (lOYR 3/3) when moist; moderate, medium, <br />prismMic structure that break to moderate, medhtm, <br />subangnlnr blocky; Lard when drp, firm when moist; <br />thin clay 51ms on the surface of soil aggregates; non- <br />calcareous; g:;ndual, wavy boundary. <br />B3ct-10 to 1G inches, pale-brown (lOYR G/3) silty clay loam, <br />Urown (lOPR 5/3) when moist; uwdcrntc, medium, <br />prismatic strnchu'e that break to moderate, medium, <br />snhangalar blocks; bnrd when dry, friable when <br /> <br />