LOCATION LAWRIE OKEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, thermic Pachic Argiustolls
TYPICAL PEDON: Lawrie loam--cultivated. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 6 inches; reddish brown (5YR 4/3) crushed dry loam; dark reddish brown (5YR 3/3) crushed moist; moderate fine subangular blocky structure parting to moderate medium granular; soft, very friable; many very fine and fine roots throughout; common very fine and fine tubular pores with low vertical continuity; moderately acid (pH 5.8); abrupt smooth boundary. (6 to 25 inches thick)
Ad--6 to 10 inches; reddish brown (5YR 4/3) crushed dry loam; dark reddish brown (5YR 3/3) crushed moist; moderate coarse subangular blocky structure; very hard, very firm; many very fine and fine roots between peds; few very fine tubular pores with low vertical continuity; moderately acid (pH 5.8); abrupt smooth boundary. (0 to 4 inches thick)
Bt1--10 to 19 inches; reddish brown (5YR 4/3) crushed dry silty clay loam; dark reddish brown (5YR 3/3) crushed moist; moderate medium subangular blocky structure parting to moderate fine subangular blocky; hard, friable; common very fine and fine roots throughout; many very fine and many fine tubular pores with moderate vertical continuity; common faint discontinuous clay films on faces of peds; moderately acid (pH 6.0); gradual smooth boundary. (9 to 26 inches thick)
Bt2--19 to 26 inches; reddish brown (5YR 4/3) crushed dry silty clay loam; dark reddish brown (5YR 3/3) crushed moist; moderate medium prismatic structure parting to strong medium angular blocky; hard, very firm; common very fine roots throughout; many very fine and many fine tubular pores with moderate vertical continuity; many distinct continuous clay films on faces of peds; slightly acid (pH 6.3); gradual wavy boundary. (0 to 26 inches thick)
Btb1--26 to 34 inches; reddish brown (5YR 4/3) crushed dry clay loam; dark reddish brown (5YR 3/3) crushed moist; strong medium prismatic structure parting to strong medium angular blocky; very hard, very firm; common very fine roots throughout; common fine continuous tubular and many very fine tubular pores with moderate vertical continuity; many distinct continuous clay films on vertical and horizontal faces of peds; slightly acid (pH 6.3); gradual wavy boundary. (7 to 22 inches thick)
2Btb1--34 to 51 inches; red (2.5YR 4/6) crushed dry loam; dark red (2.5YR 3/6) crushed moist; strong medium prismatic structure parting to strong medium angular blocky; very hard, very firm; few very fine roots throughout; common fine continuous tubular and many very fine tubular pores with moderate vertical continuity; many distinct continuous clay films on vertical and horizontal faces of peds; slightly acid (pH 6.5); diffuse wavy boundary. (0 to 23 inches thick)
2Btb2--51 to 72 inches; red (2.5YR 5/6) crushed dry loam; red (2.5YR 4/6) crushed moist; strong coarse prismatic structure parting to strong coarse angular blocky; very hard, firm; few very fine roots throughout; many very fine, few medium continuous tubular pores with moderate vertical continuity and common fine tubular pores with moderate vertical continuity; few faint continuous clay films on vertical and horizontal faces of peds; common fine irregular masses of iron-manganese; neutral (pH 7.0); abrupt wavy boundary. (0 to 14 inches thick)
2Bkb--72 to 82 inches; red (2.5YR 5/6) crushed dry loam; red (2.5YR 4/6) crushed moist; moderate medium prismatic structure parting to moderate medium angular blocky; hard, firm; few very fine roots throughout; many very fine, many fine, and common medium tubular pores with moderate vertical continuity; secondary calcium carbonates are long narrow vertically oriented masses of soft lime; many very coarse and extremely coarse cylindrical masses of lime; strongly effervescent (HCl, 1 normal) continuous; moderately alkaline (pH 8.0); gradual wavy boundary. (0 to 23 inches thick)
2BCkb--82 to 89 inches; red (2.5YR 5/6) crushed dry sandy clay loam; red (2.5YR 4/6) moist; weak medium prismatic structure; hard, friable; few very fine roots between peds; many very fine many fine and common medium tubular pores moderate vertical continuity; common fine irregular masses of iron-manganese; many very coarse and extremely coarse cylindrical soft masses of lime, and few fine and medium dendritic lime nodules; strongly effervescent (HCl, 1 normal) continuous; moderately alkaline (pH 8.0). (0 to 22 inches thick)
TYPE LOCATION: Logan County, Oklahoma; 1,800 feet east and 700 feet south of the northwest corner of Section 27, T. 17 N., R. 1 W. Lat. 35-55-32 N, Long. 97-17-39 W.
RANGE IN CHARACTERISTICS: Solum thickness and depth to bedrock is greater than 60 inches. Thickness of the Mollic epipedon ranges from 20 to 55 inches. Depth to secondary carbonate ranges from 30 to more than 60 inches.
The A horizons have hue of 5YR to 10YR, value of 3 to 5, and chroma of 2 or 3. Texture is silt loam or loam. Reaction is slightly acid to slightly alkaline, but ranges to very strongly acid where anhydrous ammonia fertilizer has been used extensively. Some pedons an overwash of fine sandy loam. The overwash material is less than 20 inches thick.
The BA horizon, where present, has hue of 5YR to 10YR, value of 4 or 5, and chroma of 2 or 3. Texture is silt loam or silty clay loam. Reaction ranges from slightly acid to moderately alkaline.
The Bt horizons have hue of 5YR or 7.5YR, value of 4 or 5, and chroma of 2 to 4. Texture is silty clay loam, silt loam, or loam. Clay content ranges from 18 to 35 percent. Reaction ranges from slightly acid to moderately alkaline.
The 2Btb horizons have hue of 2.5YR or 5YR, value of 4 or 5, and chroma of 2 to 6. Texture is silty clay loam, clay loam, silt loam or loam. Clay content ranges from 18 to 35 percent. Reaction ranges from slightly acid to moderately alkaline. Most pedons are noneffervescent.
The Bk or 2Bkb horizon, where present, has hue of 2.5YR or 5YR, value of 4 or 5, and chroma of 4 or 6. Texture is loam, sandy clay loam, silty clay loam or clay loam. Clay content ranges from 18 to 38 percent. Calcium carbonate occurs as masses or concretions. Reaction is moderately alkaline and is strongly effervescent.
The BC, BCk, or 2BCkb horizon, where present, have color, texture, and reaction similar to the Bk or 2Bkb horizon.
COMPETING SERIES: These are the Braman, Corbin, Irene, Pond Creek, St. Paul, and Westview series. Corbin and Pond Creek soils are on uplands. Corbin soils have hues of 7.5YR or 10YR in the argillic horizon, and over 35 percent clay in the lower argillic horizon. Irene, St. Paul, and Westview soils are on uplands in the Central Rolling Red plains (MLRA 78C); these soils have P-E indices of 44 or less and have secondary carbonates within 40 inches of the surface. Braman soils developed in Pleistocene sediments on high flood plains of major streams.
GEOGRAPHIC SETTING: Lawrie soils are on nearly level to very gently sloping flood plains in The Central Rolling Red Prairies (MLRA 80A). Slopes range from 0 to 3 percent. The soil formed in loamy alluvium of Recent age. These soils formed along entrenched drains that have been stable in the past, and have gone through several cycles of aggradation and degradation. Mean Annual Precipitation: 26 to 40 inches. Mean Annual Temperature: 58 to 64 degrees F. Thorthwaite Annual P-E indices: 44 to 64. Frost free days: 200 to 230. Elevation: 700 to 1400 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Ashport, Easpur, Miller, Norge, Port, Pulaski, Teller, and Yahola series. Ashport, Easpur, Port ,Pulaski, and Yahola soils are on lower elevations of flood plains nearer to the stream. In addition Easpur soils have a fine-loamy control section and Yahola and Pulaski soils have a coarse-loamy control section. Norge and Teller soils are on stream terraces farther from the stream. In addition, Teller soils have a fine-loamy control section.
DRAINAGE AND PERMEABILITY: Lawrie soils are well drained. Runoff is negligible on 0 to 1 percent slopes and very low on 1 to 3 percent slopes and permeability is moderate or moderately slow. These soils are rarely flooded to occasionally flooded for very brief periods from March through October.
USE AND VEGETATION: Most of these soils are cultivated to small grains, alfalfa, or grain sorghums. Small areas are used for range or tame pastures. Native vegetation is tall and mid grasses with bur oak, pecan, and cottonwood trees.
DISTRIBUTION AND EXTENT: Central Rolling Red Prairies (MLRA 80A) of Oklahoma, and possibly Kansas and Texas. The soil is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Logan County, Oklahoma; 1992.
REMARKS: These soils were formerly mapped as Port.
Diagnostic Horizons and Features recognized for this series are: Mollic Epipedon - 0 to 34 inches
Argillic horizon - 19 to 72 inches
Soil Interpretation Record: OK0389 Lawrie Series