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BLUE EARTH SERIE S <br /> The Blue Earth series consists of very deep,very poorly drained soits that formed ii�coprogenous earth in ' <br /> postglacial lakes and flood pfains.Slopes range fram 0 to 1 percent. �[ean annual precipitation is about 711 <br /> mm(28 inches). �lean annual temperature is about 9 degrees C(d8 degrees F). <br /> TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, mesic Mollic <br /> Fluvaquents <br /> TYPICAL P�DON: Blue Earth mucky silty clay loam with a plane level slope in tlie , <br /> bottom of a former postglacial lake; cultivated field. (Colors are for moist soil tinless , <br /> otherwise noted.) ', <br /> Ap--O to 25 cm(0 to 10 inches); black(tOYR 2/1)mucky silty ciay loam (coprogenous <br /> ea�-th), dark gray (SY 4/1) dry; weak fine granular structure; very friable; few snail she(Is i <br /> and fragments af snail shells; slightly effervescent; s(ightly alkaline; abrupt smooth , <br /> boundary. [20 to 30 cm (8 to 12 inches thick)] ' <br /> ; <br /> Cg--25 to 173 cm (10 to 68 inches}; very dark b ay (l 0YR 3/I) mucky silty clay loam ' <br /> (coprogenous earth), very dark gray(SY 3/I}clay Ioam, and dark olive gray (SY 3/2) ; <br /> clay loam; few fine prominent dark brown(7.SYR 3/2) and few �ne dark reddish brown <br /> (5YR 3/2) Fe concentrations; massive with distinct bedding planes; very friable; snail ', <br /> shells ranging from few to many in different parts;strongly effervescent; siightly <br /> alka(ine. ' <br /> 2Cg1--173 to 183 cm (68 to 72 inches); dark olive geay (SY 3/2)ciay loam; massive; ' <br /> friable; fe�v snail shells; strongly effervescent; sliglitly aika(ine; clear smooth boundary. ' <br /> 2Cg2--183 to 203 cm(72 to 80 inches); very dark geay (5Y 3/1} clay loam; massive; ' <br /> friable; common snail shells; strongly effervescent; slightly alkaline. ', <br /> TYPE LOCATIOI�T: Martin County,Minnesota; about 9 miles south and 7 miles east of '�, <br /> Fairmont; about 472 m(1,550 feet} east and 30 m (100 feet) south of the northwest ' <br /> corner of sec. 28, T. I 01 N., R. 29 W.; USGS East Chain quadrangle; lat. 43 degrees 31 ', <br /> minutes 44 seconds N. and long, 94 degrees I9 minutes 16 seconds W.,NAD 27. <br /> RANGE IN CHARACTERISTICS: The thickness of the coprogenous earth and the ' <br /> depth to laamy glacial till or gfacia( lacustcine sediments ranges from 76 cm (30 to more ', <br /> than 203 cm (80 inches). Free carbonates are in all parts of these sediments, The , <br /> coprogenous earth contains from 0 to 25 percent by volume of shell fragments. ; <br /> The Ap oc A horizon has hue of�lOYR,2.SY, SY or neutral, value of 2 or 3 and chroma ' <br /> of 0 to 2. It is mticky silty clay loam, mucky silt loam, mucky silty clay,silt loam or silty <br /> clay loam. Some pedons have �nuck(sapric)sarface layers less than 20 cm (8 inches) , <br /> thick. ' <br /> The Cg horizon has hue of lOYR, 2.SY, SY or neutrai, value of 2 to 4, and chroma of 0 to <br /> 2. [t is silt loam, silty clay loam, loam,ar clay loam, or mucky analogues. The sand <br /> I <br /> , <br /> � <br /> � <br />