LOCATION MAPLEGROVE MOEstablished Series
TAXONOMIC CLASS: Fine, mixed, active, thermic Oxyaquic Argiudolls
TYPICAL PEDON: Maplegrove silt loam, on a 1 to 3 percent slope in a pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; very dark grayish brown (10YR 3/2), crushed, silt loam, dark grayish brown (10YR 4/2), crushed, dry; moderate medium subangular blocky structure parting to moderate fine granular; very friable; many very fine and fine roots; many very fine and fine tubular pores; 1 percent rounded limestone-cherty gravel; slightly acid; clear smooth boundary.
A--6 to 11 inches; very dark grayish brown (10YR 3/2), crushed, silt loam, grayish brown (10YR 5/2), crushed, dry; moderate fine subangular blocky structure parting to weak fine granular; very friable; common very fine and fine roots; many very fine and fine tubular pores; 1 percent rounded limestone-cherty gravel; moderately acid; abrupt smooth boundary.
2Bt1--11 to 17 inches; 60 percent brown (10YR 4/3), interior, and 40 percent red (2.5YR 4/8), interior, silty clay loam; moderate fine prismatic structure parting to strong fine angular blocky; very firm, moderately sticky and moderately plastic; common very fine and fine roots between peds; common very fine and fine interstitial and tubular pores; many prominent continuous brown (10YR 4/3) clay films on faces of peds and few prominent discontinuous yellowish red (5YR 4/6) clay films on faces of peds and very few distinct continuous very dark grayish brown (10YR 3/2) organic coats on faces of peds and in pores; many fine and medium irregular red (2.5YR 4/8) masses of iron accumulation throughout and few fine rounded black (N 2/0) masses of iron-manganese accumulation throughout; 1 percent rounded limestone-cherty gravel; moderately acid; clear smooth boundary.
2Bt2--17 to 27 inches; dark yellowish brown (10YR 4/4), interior, silty clay; moderate fine prismatic structure parting to strong fine subangular blocky; very firm, moderately sticky and moderately plastic; few very fine and fine roots between peds; common very fine and fine interstitial and tubular pores; many prominent continuous grayish brown (10YR 5/2) clay films on faces of peds and few prominent discontinuous yellowish red (5YR 4/6) clay films on faces of peds; common fine irregular black (N 2/0) masses of iron-manganese accumulation between peds and common fine rounded black (N 2/0) iron-manganese concretions throughout and common fine irregular red (2.5YR 4/8) masses of iron accumulation throughout; 1 percent rounded limestone-cherty gravel; strongly acid; clear wavy boundary.
3Bt3--27 to 46 inches; dark yellowish brown (10YR 4/6), interior, silty clay loam; moderate fine subangular blocky structure; very firm, very sticky and very plastic; few very fine and fine roots between peds; common very fine and fine interstitial and tubular pores; common prominent continuous very dark grayish brown (10YR 3/2) clay films on faces of peds and few prominent continuous dark grayish brown (10YR 4/2) clay films on faces of peds and few prominent patchy dark yellowish brown (10YR 4/6) clay films on faces of peds; common fine irregular black (N 2/0) masses of iron-manganese accumulation between peds and common fine rounded black (N 2/0) masses of iron-manganese accumulation throughout and few fine irregular red (2.5YR 4/8) masses of iron accumulation throughout; 1 percent rounded limestone-cherty gravel; slightly acid; clear wavy boundary.
4Bt4--46 to 62 inches; 90 percent yellowish brown (10YR 5/4), interior, and 1 percent light brownish gray (10YR 6/2), interior, and 9 percent yellowish brown (10YR 5/8), interior, very stony clay; strong fine angular blocky structure; very firm, very sticky and very plastic; few very fine and fine interstitial and tubular pores; very few prominent discontinuous dark yellowish brown (10YR 4/6) clay films on faces of peds and many prominent continuous pale brown (10YR 6/3) clay films on faces of peds and few prominent continuous yellowish brown (10YR 5/4) clay films on faces of peds; many fine irregular black (N 2/0) masses of iron-manganese accumulation between peds and common fine irregular black (N 2/0) masses of iron accumulation between peds and few fine irregular red (2.5YR 4/8) masses of iron accumulation between peds; 20 percent angular limestone-cherty gravel and 30 percent subrounded limestone-cherty stones; neutral; diffuse wavy boundary.
4Bt5--62 to 80 inches; 95 percent yellowish brown (10YR 5/4), interior, and 5 percent gray (10YR 6/1), interior, gravelly clay; strong fine angular blocky structure; very firm, very sticky and very plastic; few very fine and fine interstitial and tubular pores; many prominent continuous yellowish brown (10YR 5/4) clay films on faces of peds and few prominent continuous gray (10YR 6/1) clay films on faces of peds; common fine irregular black (N 2/0) masses of iron-manganese accumulation between peds and common fine irregular strong brown (7.5YR 5/8) masses of iron accumulation throughout and few fine rounded red (2.5YR 4/8) masses of iron accumulation throughout; 18 percent angular limestone-cherty gravel and 2 percent angular limestone-cherty cobbles; slightly alkaline.
TYPE LOCATION: Jasper County, Missouri; about one mile southwest of Carthage; 1600 feet west and 1250 feet south of the northeast corner, sec 20 T. 28 N., R. 31 W.; Carthage quadrangle, UTM Zone: 15 UTM Easting: 381441 UTM Northing: 4110897
RANGE IN CHARACTERISTICS:
Solum: 61 to more than 80 inches.
Control section: 35 to 60 percent clay
Depth to 2Bt: 10 to 20 inches.
A horizon:
Hue: 10YR
Value: 3, moist and 4 or 5, dry
Chroma: 2 or 3
Texture: silt loam
Rock fragments: 0 to 3 percent gravel or cobbles
Reaction: 6.1 to 7.3
Redoximorphic features: none to few iron-manganese accumulations and none to few iron accumulations in shades of brown
2Bt horizon
Hue: 2.5YR to 10YR
Value: 3 to 5
Chroma: 3 to 8
Texture: silty clay loam, clay, or silty clay
Rock fragments: 1 to 3 percent gravel or cobbles
Reaction: 5.1 to 6.5
Redoximorphic features: None to many iron accumulations in shades of red, yellow, or brown. None to few iron-manganese accumulations. Few to many clay films in shades of gray or grayish brown or few iron depletions in shades of gray
3Bt horizon
Hue: 5YR to 10YR
Value: 4 or 5
Chroma: 3 to 8
Texture: silty clay, silty clay loam, or clay or their gravelly, very gravelly, or extremely gravelly or cobbly analogs
Rock fragments: 1 to 70 percent gravel or cobbles
Reaction: 6.1 to 7.8
Redoximorphic features: None to common iron accumulations in shades of red or brown. None to common iron-manganese accumulations Few to many clay films in shades of gray or grayish brown or few iron depletions in shades of gray. None to few silt coats
3Btg horizon (where present)
Hue: 10YR or 2.5Y
Value: 4 to 6
Chroma: 1 or 2
Texture: silty clay, silty clay loam, or clay or their gravelly, very gravelly, or extremely gravelly or cobbly analogs
Rock fragments: 1 to 70 percent gravel or cobbles
Reaction: 6.1 to 7.8
Redoximorphic features: Few to common iron-manganese accumulations, few to many iron accumulations in shades of brown or red, and none to few silt coats
4Bt horizon
Hue: 10YR
Value: 5 or 6
Chroma: 4 to 8
Texture: clay or their gravelly, very gravelly or extremely gravelly or cobbly or stony counterparts
Rock fragments: 20 to 80 percent gravel or cobbles
Reaction: 6.6 to 7.8
Redoximorphic features: None to common iron accumulations in shades of red or brown, none to many iron-manganese accumulations, few clay films in shades of gray or grayish brown or few iron depletions in shades of gray, and none to few silt coats. Some pedons are mottled with 5 percent or less of above colors and hue of 10YR and value of 6 and chroma of 1 or 2
4Btg horizon (where present)
Hue: 10YR
Value: 6
Chroma: 1
Texture: very or extremely cobbly, gravelly, or stony clay
Rock fragments: 60 to 80 percent gravel, cobbles, or stones
Reaction: 6.6 to 7.8
Redoximorphic features: Few to common iron-manganese accumulations and few to many iron accumulations in shades of brown or red
Some pedons are underlain with limestone bedrock below a depth of 60 inches.
COMPETING SERIES: There are no competing series in this family.
GEOGRAPHIC SETTING:
Slope: level or nearly level (1 to 3 percent)
Landform:
Landscape: slightly convex broad uplands
Parent material: thin mantle of silty loess over clayey loess over clayey residium.
Mean annual temperature: 56 to 58 degrees F
Mean annual precipitation: 38 to 42 inches.
GEOGRAPHICALLY ASSOCIATED SOILS:
Eldorado soils: on gently sloping side slopes and are loamy skeletal.
Osage soils: on lower terrace positions and are poorly drained and have high shrink-swell potential.
Newtonia soils: on similar landscape positions and are well drained and are fine-silty.
DRAINAGE AND PERMEABILITY:
Drainage: moderately well
Permeability: slow
Runoff: medium
In undisturbed areas, the upper depth of to water saturation is 2.5 to 3.5 feet during December to February in most years.
USE AND VEGETATION: Most areas are in cropland or pasture. A few areas are in native hayland. Principal crops are wheat, corn, milo, and soybeans. Native vegetation is prairie grasses, mainly big and little bluestem.
DISTRIBUTION AND EXTENT: Southwest Missouri and possibly Southeast Kansas and Northeast Oklahoma. The soils are of minor extent. The Maplegrove series is found on the Warsaw and Keokuk formations in the Mississippian geology.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Jasper County, Missouri, 2000. The name is from a small community in the northeast part of Jasper County.
REMARKS: Missouri Characterization Laboratory Sample M9609732. These soils were formerly included in the Gerald and Creldon series. Diagnostic horizons and features recognized in this series are: mollic epipedon - the zone from the surface of the soil to a depth of 11 inches (Ap and A horizons); argillic horizon - the zone from 11 to 80 inches (2Bt, 3Bt, 4Bt horizons); redox depletions in the upper 10 inches of the argillic horizon.