LOCATION DARLOW KSEstablished Series
The Darlow series consists of very deep, somewhat poorly drained, very slowly permeable soils formed in loamy, calcareous alluvium on terraces in river valleys of the Great Bend Sand Plains (MLRA 79). Slope ranges from 0 to 1 percent. The mean annual precipitation is 29 inches (74 centimeters), and the mean annual temperature is 56 degrees F (13 degrees C).
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Vertic Natrustalfs
TYPICAL PEDON: Darlow loam in a cultivated field. (Colors are for dry soil unless otherwise stated.)
Ap1--0 to 5 inches (0 to 12 centimeters); pale brown (10YR 6/3) loam; brown (10YR 5/3) moist; weak fine granular structure; soft, very friable, non sticky, non plastic; common fine roots; strongly acid, abrupt smooth boundary.
Ap2--5 to 8 inches (12 to 20 centimeters); brown (10YR 5/3) silt loam; brown to dark brown (10YR 4/3) moist; weak medium platy structure parting to weak very fine subangular blocky; soft, very friable, non sticky, nonplastic; common fine and medium roots; strongly acid, clear smooth boundary.
Btn--8 to 14 inches (20 to 36 centimeters); dark grayish brown (10YR 4/2) loam; very dark grayish brown (10YR 3/2) moist; weak medium prismatic structure parting to moderate medium subangular blocky; slightly hard, firm, moderately sticky, moderately plastic; common fine roots; very dark gray (10YR 3/1) discontinuous clay films (cutans) on faces of peds; few fine irregular nests of gypsum; slightly effervescent (HCl, unspecified);neutral, abrupt smooth boundary.
Btny--14 to 20 inches (36 to 50 centimeters); grayish brown (10YR 5/2) clay loam; dark grayish brown (10YR 4/2) moist; few fine prominent brown to dark brown (7.5YR 4/4), and strong brown (7.5YR 5/6) redoximorphic concentrations; moderate medium prismatic structure parting to moderate medium subangular blocky; slightly hard, firm, moderately sticky, moderately plastic; common fine roots; dark grayish brown (10YR 4/2) discontinuous clay films (cutans) on faces of peds; common fine irregular nests of gypsum, and few fine irregular lime nodules; slightly effervescent (HCl, unspecified); moderately alkaline, clear wavy boundary.
Btknyz--20 to 26 inches (50 to 66 centimeters); pale brown (10YR 6/3) loam; brown (10YR 5/3) moist; few fine distinct brown to dark brown (7.5YR 4/4), and prominent strong brown (7.5YR 5/6) redoximorphic concentrations; moderate medium prismatic structure parting to weak medium subangular blocky; slightly hard, firm, moderately sticky, moderately plastic; few fine roots; few, fine irregular threads of soluble salts between ped faces; common fine irregular gypsum threads, and few fine irregular lime concretions; strongly effervescent (HCl, unspecified); moderately alkaline, clear wavy boundary.
Btnz1--26 to 34 inches (66 to 85 centimeters); very pale brown (10YR 7/3) loam; pale brown (10YR 6/3) moist; few fine prominent dark red (2.5YR 3/6), and strong brown (7.5YR 5/6) redoximorphic concentrations; moderate medium subangular blocky structure; slightly hard, firm, moderately sticky, moderately plastic; few very fine roots; common fine irregular soft masses of iron-manganese; strongly effervescent (HCl, unspecified); moderately alkaline, clear wavy boundary.
Btnz2--34 to 44 inches (85 to 112 centimeters); 65percent light brown (7.5YR 6/4), and 35percent very pale brown (10YR 7/3) loam; 65percent strong brown (7.5YR 5/6), and 35percent pale brown (10YR 6/3) moist; common medium prominent strong brown (7.5YR 5/6), and strong brown (7.5YR 4/6) redoximorphic concentrations; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; few very fine roots; few, fine 2.5YR 4/6 iron-manganese stains on ped faces; moderately alkaline, clear smooth boundary.
B'tn1--44 to 54 inches (112 to 134 centimeters); 65 percent light brown (7.5YR 6/4), and 35 percent very pale brown (10YR 7/3) loam; 65percent brown (7.5YR 5/4), and 35percent pale brown (10YR 6/3) moist; common medium prominent yellowish red (5YR 5/8) redoximorphic concentrations; weak fine prismatic structure parting to weak fine blocky; hard, firm, moderately sticky, moderately plastic; few, fine 2.5YR 4/6 iron-manganese stains on ped faces; faint brown (7.5YR 5/4) discontinuous clay films (cutans) on faces of peds;moderately alkaline, clear wavy boundary.
B'tn2--54 to 68 inches (134 to 173 centimeters); brown (7.5YR 5/4) loam; brown to dark brown (7.5YR 4/4) moist; moderate medium prismatic structure parting to weak medium subangular blocky; hard, firm, slightly sticky, slightly plastic; common, fine 2.5YR 3/6 iron-manganese stains on ped faces; distinct brown (7.5YR 5/4) discontinuous clay films (cutans) in root channels and/or pores; moderately alkaline, clear wavy boundary.
2Btn3--68 to 80 inches (173 to 203 centimeters); 65 percent light brown (7.5YR 6/4), and 35 percent pale brown (10YR 6/3) sandy loam; 65 percent brown (7.5YR 5/4), and 35 percent brown (10YR 5/3) moist; common fine and medium prominent strong brown (7.5YR 4/6) redoximorphic concentrations; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; few, fine 7.5YR 5/8 iron-manganese stains between peds; clay bridging between sand grains; moderately alkaline, clear wavy boundary.
TYPE LOCATION: Reno County, Kansas; 1690 feet (515 meters) south and 235 feet (72 meters) west of the northeast corner of sec. 36, T. 23 S., R. 6 W. (USGS Hutchinson topographic quadrangle; lat. 38 degrees 0 minutes 32.3 seconds N. and long. 97 degrees 55 minutes 20.4 seconds W.)
RANGE IN CHARACTERISTICS:
Soil moisture regime: ustic moisture regime bordering on udic
Soil temperature regime: mesic
Mean annual soil temperature: 56 to 58 degrees F (13 to 14 degrees C).
Particle-size control section: 20 to 35 percent clay
Depth to bedrock: greater than 80 inches (203 centimeters)
Depth to secondary calcium carbonate: 0 to 10 inches (0 to 25 centimeters)
Depth to salt accumulations: 10 to 20 inches (25 to 50 centimeters)
Depth to gypsum accumulations: 8 to 15 inches (20 to 38 centimeters)
Depth to lithologic discontinuity: greater than 40 inches (102 centimeters)
Thickness of the mollic epipedon: 8 to 19 inches (20 to 49 centimeters)
A horizon:
Hue: 10YR
Value: 3 to 6 (dry) 2 to 5 (moist)
Chroma: 1 to 3
Texture: loam or silt loam
SAR: 0 to 5
Reaction: strongly acid to neutral
Bt horizon:
Hue: 10YR or 7.5YR
Value: 4 to 7 (dry) 3 to 6 (moist)
Chroma: 2 to 4
Texture: loam or clay loam
Calcium carbonate equivalent: 0 to 2 percent
SAR: 15 to 40
Reaction: neutral to moderately alkaline
2Bt horizon:
Hue: 7.5YR or 10YR
Value: 5 to 7 (dry) 4 to 6 (moist)
Chroma: 3 or 4
Texture: loam or sandy loam
Calcium carbonate equivalent: 0 to 1 percent
SAR: 10 to 20
Reaction: slightly alkaline or moderately alkaline
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Darlow soils
Parent material: loamy calcareous old alluvium
Landform: terraces of the Arkansas River
Slopes: 0 to 1 percent
Elevation: 1515 to 1805 feet (461.8 to 550.2 meters)
Mean annual air temperature: 55 to 57 degrees F (13 to 14 degrees C).
Mean annual precipitation: 28 to 31 inches (71 to 79 centimeters)
Wettest months: Mar. - Oct.
Driest months: Nov. - Feb.
Frost-free period: 187 to 225 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Elmer soils. The moderately well drained Elmer soils have a mollic epipedon. They are on similar landscape positions.
DRAINAGE AND PERMEABILITY:
Somewhat poorly drained.
Runoff is slow.
Permeability is very slow.
USE AND VEGETATION: Nearly all areas are cultivated. Principal crops are wheat and grain sorghum. Native vegetation was mid and tall grasses.
DISTRIBUTION AND EXTENT: South Central Kansas, and possibly North Central Oklahoma. LRR H Great Plains Winter Wheat and Range, MLRA 79 Great Bend Sand Plains. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Reno County, Kansas, 1999
REMARKS: Diagnostic horizons and features recognized in this pedon are:
ochric epipedon: The zone from 0 to 8 inches (0 to 20 centimeters) (Ap1, Ap2)
natric horizon: The zone from 8 to 80 inches (20 to 203 centimeters) (Btn, Btny, Btknyz, Btnz1, Btnz2, B'tn1, B'tn2, 2Btn3)
Keys to Soil Taxonomy: Eighth edition, 1998
ADDITIONAL DATA: These soils were formerly mapped as Farnum slickspots on flood plain positions. This soil was sampled June 1991. Additional Laboratory Data: S91KS155006
http://ssldata.sc.egov.usda.gov/rptExecute.asp?p=18208&r=1&submit1=Get+Report
DARLOW SERIES
LRR=H
DATE:
07/23/91 This is a new series to be used in Reno County, Kansas.
06/14/95 Series has been updated. Resent today to correct the taxonomy on sir and osed. PRF
12/10/99 Series is established with the final correlation of Reno County soil survey update.