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Official Series Description -SON Series Page I of 2 <br /> ' LOCATION LIMON CO+KS UT WY <br /> ' Established Series <br /> GB <br /> 02/97 <br /> LIMON SERIES <br /> 1 The Limon series consists of deep, well drained, slowly permeable soils that formed <br /> in relatively uniform alluvial deposits derived principally from clay shales. Limon <br /> 1 soils are on flood plains or alluvial fans and have slopes of 0 to 12 percent. The <br /> mean annual precipitation is about 15 inches and the mean annual temperature is about <br /> 48 degrees F. <br /> ' TAXONOMIC CLASS: Fine, smectitic, calcareous, mesic Ustertic Torriorthents <br /> TYPICAL PEDON: Limon silty clay loam - grassland. (Colors are for dry soil unless <br /> otherwise notev.) <br /> ' A-0 to 4 inches; light brownish gray(2.5Y 6/2) silty clay loam, dark grayish <br /> brown(2.5Y 4/2)moist; strong very fine granular structure; weak platy in the upper <br /> 1/4 inch; soft, very friable; calcareous; moderately alkaline(pH 8.2); clear smooth <br /> i ' boundary. (2 to 6 inches thick) <br /> ' AC--4 to 20 inches; grayish brown (2.5Y 5/2)silty clay, dark grayish brown <br /> (2.5Y 4/2)moist; weak coarse angular blocky structure; extremely hard, friable, very <br /> plastic;calcareous; moderately alkaline(pH 8.4); gradual wavy boundary. (10 to 18 <br /> ' inches thick) <br /> Ck-20 to 60 inches; light yellowish brown(2.5Y 6/3)silty clay,olive brown <br /> ' (2.5Y 4/3) moist; massive; extremely hard, firm,very plastic; few visible secondary <br /> calcium carbonate concretions; calcareous; moderately alkaline (pH 8.4). <br /> ' TYPE LOCATION: Bent County,Colorado; approximately 0.45 mile north and 0.15 mile <br /> east of the southwest comer of Sec. 7, T. 21 S., R. 52 W. <br /> ' RANGE IN CHARACTERISTICS: The content of organic carbon in the A horizon ranges from <br /> 0.6 to 1.5 percent, and decreases uniformly with increasing depth. Conductivity <br /> typically ranges from less than I to 4 millimhos and exchangeable sodium percentage <br /> is usually less than 14 percent throughout the particle size control section, but <br /> both differs widely between individual horizons. Conductivity may range to 10 <br /> millimhos/cm in some pedons. Cation exchange capacity ranges from 60 to 90 <br /> ' millequivalents per 100 grams of clay. The particle size control section is <br /> typically light silty clay, clay, or heavy silty clay loam and clay ranges from 35 to <br /> 60 percent, silt from 10 to 60 percent,and sand from 5 to 40 percent with less than <br /> ' 35 percent fine sand or coarser. Rock fragments range from 0 to 10 percent but are <br /> typically less than 2 percent. Mean annual soil temperature ranges from 47 to 58 <br />