Laserfiche WebLink
' <br /> � CORD <br /> OVA SERIES <br /> ' I he Cordova series consists of very deep, poorly drained soils that formed mostly in loamy calcareous <br /> giacial till on ground moraines and till plains. The upper part of the profile in some of these soils formed in <br /> , modified glacial tilL These soils have moderately slow permeability. Their slopes are less than Z percent. <br /> Mean annual precipitation is about 28 inches. Mean annual temperature is about 48 degrees F. <br /> TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Argiaquolls <br /> ' TYPICAL PEDON: Cordova clay loam with a plane slope of 1 percent in a cultivated <br /> field. (Colors are for moist soil unless otherwise stated.) <br /> ' Ap--O to 10 inches; black (N 2/0) clay loam, very dark gray (lOYR 3/1) dry; moderate <br /> medium subangular blocky structure; friable; about 1 percent gravel; neutral; abrupt <br /> wavy boundary. <br /> ' A--10 to 18 inches; black (N 2/0) clay loam, very dark gray(lOYR 3/1) dry; moderate <br /> medium subangular blocky structure; friable; about 1 percent gravel; neutral; clear wavy <br /> tboundary. (Combined A horizon is 8 to 20 inches.) <br /> Btgl--18 to 30 inches; olive gray (SY 4/2) clay loam; few fine prominent dark yellowish <br /> ' brown (l 0YR 4/6) Fe concentrations; moderate medium angular blocky structure parting <br /> to moderate fine angular blocky; friable; common very dark gray(SY 3/1) clay films on <br /> faces of peds and in pores; about 3 percent gravel; neutral; clear wavy boundary. <br /> ' Btg2--30 to 38 inches; olive gray(SY 5/2) clay loam; common fine prominent dark <br /> yellowish brown (lOYR 4/6) Fe concentrations; weak medium subangular blocky <br /> ' structure; friable; few distinct very dark gray(SY 3/1) clay films on faces of peds and in <br /> pores; about 3 percent gravel; neutral; abrupt wavy boundary. (Combined Btg horizon is <br /> 12 to 40 inches thick.) <br /> ' C--38 to 80 inches; light olive gray (SY 6/2) loam; common medium prominent <br /> yellowish brown (l 0YR 5/6) Fe concentrations; massive; friable; about 5 percent gravel; <br /> ' strongly effervescent; slightly alkaline. <br /> TYPE LOCATION: Waseca County, Minnesota; about 5 miles north of Waseca; 550 <br /> ' feet south and 1100 feet east of the northwest corner of Sec. 22, T.108N., R.22W.; USGS <br /> Morristown quadrangle; lat. 44 degrees 8 minutes 32 seconds N. and long. 93 degrees 27 <br /> minutes 45 seconds W., NAD27. <br /> ' RANGE IN CHARACTERISTICS: Depth to free carbonates ranges from 24 to 50 <br /> inches. Thickness of the mollic epipedon ranges from 10 to 24 inches. Rock fragment <br /> content is 2 to 6 percent throughout and is of mixed lithology, but some pedons have less <br /> ' than 2 percent in the upper part. The A horizons are neutral to moderately acid. The B <br /> horizons range from strongly acid to slightly alkaline. <br /> ' The Ap or A horizon has hue of lOYR, 2.SY or is neutral, value of 2 or 3 and chroma of 0 <br /> or 1. It is loam, silty clay loam, or clay loam. Eluviation is evident in some pedons by a <br /> few porous coatings on the faces of peds in the lower A and/or upper B horiozns. <br /> ' <br /> ' <br />