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<br />PINON SERIES <br />LOCATION PINON NM+UT <br />Established Series <br />RD: BDS/CDURJA <br />5/86 <br />The Pinon series consists of shallow, well drained, moderately slowly permeable soils <br />that formed in alluvium and residuum derived from limestone. These soils are on knolls, <br />ridges, mesas and hillslopes with slopes ranging from 1 to 30 percent. Mean annual <br />precipitation is about 13 inches; mean annual temperature is about 53 degrees F. <br />TAXONOMIC CLASS: Loamy, mixed, mesic Lithic Ustollic Calciorthids <br />TYPICAL PEDON: Pinon channery loam -rangeland. (Colors are for dry soil unless <br />otherwise noted.) <br />A--O to 7 inches; brown (7.5YR 5/3) channery loam, dark brown (7.5YR 4/3) moist; <br />moderate very fine granular structure; soft, very friable, slightly sticky and slightly plastic; <br />many fine and fine roots; about 4 percent limestone fragments; strongly effervescent; <br />disseminated calcium carbonate; moderately alkaline; clear smooth boundary. (3 to 10 <br />inches thick) <br />Bk1--7 to 10 inches; light brown (7.5YR 6/3) channery loam, brown (7.5YR 5/3) moist; <br />massive; slightly hard, very friable, slightly sticky and slightly plastic; strongly <br />. effervescent with common large concretions, few thin seams and streaks of calcium <br />carbonate; moderately alkaline; clear smooth boundary. (2 to 4 inches thick) <br />Bk2--10 to 16 inches; pinkish white (7.5YR 8/2) channery loam, pinkish gray (7.5YR 6/2) <br />moist; massive; slightly hard, very friable, slightly sticky and slightly plastic; few fine and <br />medium roots; violently effervescent with many soft segregations of calcium carbonate; <br />moderately alkaline; abrupt smooth boundary. (5 to 10 inches thick) <br />R--16 inches; fractured limestone with many lime coatings on rock fragments. <br />TYPE LOCATION: Torrance County, New Mexico; 2,340 feet east of the NW corner sec. <br />15, T. 2 N., R. 7 E. <br />RANGE IN CHARACTERISTICS: <br />Depth to bedrock: 10 to 20 inches <br />Rock fragments: 5 to 35 percent <br />Soil temperature: 52 to 57 degrees F. <br />Reaction: mildly to moderately alkaline <br />A horizon: Hue - 7.5YR or 1 OYR <br />Value: 4 through 6 dry, 2 through 5 moist <br />Chroma: 2 through 4 <br />Bk horizon: Hue - 5YR through 10YR <br />Value: 5 through 8 dry, 4 through 7 moist <br />Chroma: 2 through 4 <br />• (REVISED 9/99) 2.04.9-50 <br />