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Official Series Description -POTTER Series Page 1 of 4 <br />LOCATION POTTER TX+NM+OK <br />Established Series <br />Rev. TCB-SCH-WMR <br />04/2000 <br />POTTER SERIES <br />The Potter series consists of soils that aze shallow to a fractured and weathered caliche layer. They <br />are well drained, moderately permeable soils that formed in moderately to strongly cemented <br />caliche of Miocene-Pliocene age. These soils are on very gently sloping to steep sloping convex <br />hills, ridges, and upper side slopes, around the mazgin of larger playa lakes, ancient drainageways, <br />and along the Caprock Escarpment. Slopes range from 1 to 30 percent. The mean annual <br />precipitation is 19 inches and the mean annual temperature is 61 degrees F. <br />TAXONOMIC CLASS: Loamy-skeletal, carbonatic, thermic Petronodic Ustic Haplocalcids <br />TYPICAL PEDON: Potter gravelly loam on a northeast facing, convex, 3 percent slope in <br />rangeland at an elevation of about 3,073 feet. (Colors are for dry soil unless otherwise stated.) <br />Al--0 to 2 inches; grayish brown (lOYR 5/2) gravelly loam, dark grayish brown (1 OYR 4/2) moist; <br />weak medium subangulaz blocky structure and moderate fine granular; slightly hard, friable; many <br />very fine and fine roots; many fine and medium moderately to strongly cemented caliche fragments <br />(22 percent coarse fragments); 30 percent of the soil surface is covered with moderately cemented <br />caliche fragments 1 to 2 inches across the long axis; strongly effervescent; moderately alkaline; <br />gradual smooth boundary. <br />A2--2 to 6 inches; brown (IOYR 5/3) extremely gravelly fine sandy loam, brown (IOYR 4/3) moist; <br />weak medium subangular blocky structure; slightly hard, friable; many very fine and fine roots; few <br />fine pores; many fine and medium calcium carbonate concretions, nodules, and caliche fragments; <br />30 percent of 2 to 4 inch in diameter coarse fragments consisting of moderately to strongly <br />cemented calcium carbonate (63 percent coarse fragments); violently effervescent moderately <br />alkaline; clear wavy boundary. (combined thickness of the A horizons is 2 to 10 inches) <br />Bk--6 to 15 inches; light brownish gray (lOYR 6/2) and light gray (lOYR 7/2) very gravelly fine <br />sandy loam, grayish brown (lOYR 5/2) and light brownish gray (lOYR 6/2) moist; weak fine and <br />medium subangulaz blocky structure; hard, firm; common very fine and fine roots; few fine pores; <br />82 percent calcium carbonate equivalent as masses and nodules; about 40 percent of 2 to 4 inch in <br />diameter coarse fragments consisting of moderately cemented calcium carbonate; violently <br />effervescent; moderately alkaline; diffuse wavy boundary. (0 to 10 inches thick) <br />BCki--15 to 29 inches; white (lOYR 8/1) extremely gravelly fine sandy loam, light gray (lOYR <br />7/2) moist; 67 percent by volume, thin platy moderately cemented caliche fragments, 1 to 3 inches <br />across, plates are fractured and undersides have about 0.25 to 0.50 inch long pendants of calcium <br />carbonate; 33 percent of the volume is powdery caliche and loamy materials; few fine and medium <br />roots mainly of woody plants between plates; violently effervescent; strongly alkaline; diffuse wavy <br />http://wwwstatlab.iastate.edu/cgi-bin/osd/osdname.cgi?-P 3/ l 5/2002 <br />