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Official Series Description - TRUJILLO Series https:// soilseries. sc. egov .usda.gov /OSD_Docs /T /TRUJILLO html <br />LOCATION TRUJILLO CO <br />Established Series <br />LAN /AP <br />12/2007 <br />TRUJILLO SERIES <br />The Trujillo series consists of very deep, well drained soils that formed in alluvium derived <br />from coarse sandstone. Trujillo soils are on hills, drainageways, and fans. Slopes range <br />from 3 to 25 percent. Mean annual precipitation is about 20 inches and the mean annual <br />temperature is about 45 degrees F. <br />TAXONOMIC CLASS: Fine- loamy, mixed, superactive, frigid Typic Argiustolls <br />TYPICAL PEDON: Trujillo loam, on a south facing, moderately sloping, 7 percent slope <br />in grass at an elevation of 7,050 feet. (Colors are for dry soil unless otherwise noted.) <br />When described on June 13, 1984 the soil was moist from 13 to 33 inches. <br />A - -0 to 9 inches; dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR <br />3/2) moist; moderate medium granular structure; slightly hard, friable, slightly sticky and <br />slightly plastic; common very fine and fine roots; neutral (pH 6.6); clear smooth boundary. <br />(7 to 10 inches thick) <br />Btl - -9 to 13 inches; dark grayish brown (10YR 4/2) loam, dark brown (10YR 3/3) moist; <br />moderate medium prismatic structure parting to moderate medium subangular blocks; hard, <br />friable, slightly sticky and slightly plastic; common very fine and fine roots; common <br />patchy distinct clay films on faces of peds; neutral (pH 6.8); clear smooth boundary. <br />Bt2 - -13 to 26 inches; dark grayish brown (10YR 4/2) clay loam, brown (10YR 4/3) moist <br />and crushed; moderate medium prismatic structure parting to moderate medium subangular <br />blocks; very hard, firm, slightly sticky and slightly plastic; common continuous clay films <br />on faces of peds; neutral (pH 6.8); clear smooth boundary. <br />Bt3 - -26 to 36 inches; brown (10YR 5/3) sandy clay loam, brown (10YR 4/3) moist; <br />moderate fine and medium subangular blocky structure; hard, friable, slightly sticky and <br />slightly plastic; few patchy distinct clay films on faces of peds; neutral (pH 7.3); clear <br />smooth boundary. (Combined thickness of the Bt horizons is 23 to 40 inches) <br />Bw - -36 to 58 inches; yellowish brown (10YR 5/4) fine sandy loam, dark yellowish brown <br />(10YR 4/4) moist; weak coarse subangular blocky structure; slightly hard, friable, slightly <br />sticky and slightly plastic; few fine and very fine roots; few patchy distinct pressure faces <br />on cracks; slightly alkaline (pH 7.4); clear smooth boundary. (0 to 15 inches thick) <br />Bk - -58 to 70 inches; yellowish brown (10YR 5/4) fine sandy loam, dark yellowish brown <br />(10YR 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; few fine and <br />very fine roots; few fine irregular soft masses of lime; slightly effervescent (matrix is <br />1 of 5 4/9/2012 4:37 PM <br />