LOCATION DODGELAND CAEstablished Series
TAXONOMIC CLASS: Fine, smectitic, thermic Xeric Endoaquerts
TYPICAL PEDON: Dodgeland silty clay loam on a 1 percent slope under a cover of rice stubble at an elevation of 105 feet, (32 m). When described on 9/13/94, the soil was slightly moist below 8 inches, (20 cm), moist below 53 inches, (135 cm) and water table was at 120 inches, (305 cm). (Colors are for dry soil unless otherwise stated).
Ap1--0 to 4 inches, (0 to 10 cm); light brownish gray (10YR 6/2) silty clay loam, dark gray (10YR 4/1) moist; 39 percent clay; moderate medium subangular blocky structure parting to moderate fine granular; slightly hard, very friable, moderately sticky and moderately plastic; many fine and common very fine roots; common fine irregular and common very fine tubular pores; common fine prominent strong brown (7.5YR 4/6) moist, irregular oxidized iron masses lining pores; common fine prominent black (N 2/0) moist, irregularly shaped iron-manganese masses between peds; moderately acid, pH 6.0 by Hellige-Truog; abrupt smooth boundary.
Ap2--4 to 8 inches, (10 to 20 cm); gray (10YR 5/1) silty clay, very dark grayish brown (10YR 3/2) moist; 41 percent clay; moderate medium subangular blocky structure; hard, firm, moderately sticky and moderately plastic; common very fine, fine, and few coarse roots; few very fine tubular pores; many medium prominent strong brown (7.5YR 4/6) moist, irregular oxidized iron masses throughout; common fine prominent black (N 2/0) moist, irregular iron-manganese masses between peds; 1 percent gravel; slightly acid, pH 6.5 by Hellige-Truog; clear smooth boundary. (Combined thickness of the Ap horizon is 6 to 10 inches, (15 to 25 cm) thick).
Bss1--8 to 18 inches, (20 to 46 cm); grayish brown (10YR 5/2) silty clay, dark grayish brown (10YR 4/2) moist; 49 percent clay; weak medium prismatic structure parting to moderate fine angular blocky; extremely hard, extremely firm, very sticky and very plastic; few very fine and fine roots; few very fine tubular pores; common fine prominent brown (7.5YR 4/4) moist, irregular oxidized iron masses throughout; common fine prominent black (N 2/0) moist, irregular iron-manganese masses throughout, common fine prominent light brownish gray (10YR 6/2) irregular iron depletions throughout; few slickensides; 1 percent gravel, neutral, pH 7.0 by Hellige-Truog; gradual smooth boundary.
Bss2--18 to 33 inches, (46 to 84 cm); brown (10YR 5/3) silty clay, dark grayish brown (10YR 4/2) moist; 51 percent clay; weak coarse prismatic structure parting to moderate fine angular blocky; extremely hard, extremely firm, very sticky and very plastic; few very fine and fine roots; few very fine tubular pores; common fine prominent brown (7.5YR 4/4) moist, irregular oxidized iron masses throughout; common fine prominent black (N 2/0) moist, irregular iron-manganese masses throughout, common fine prominent light brownish gray (10YR 6/2) moist, irregular iron depletions lining pores; common slickensides; neutral, pH 7.0 by Hellige-Truog; gradual smooth boundary.
Bss3--33 to 45 inches, (84 to 114 cm); brown (10YR 5/3) silty clay, brown (10YR 4/3) moist; 49 percent clay; moderate medium angular blocky structure; very hard, very firm, moderately sticky and moderately plastic; few very fine roots; few very fine tubular pores; common fine prominent brown (7.5YR 4/4) moist, irregular oxidized iron masses of throughout; few fine prominent black (N 2/0) moist, iron-manganese masses throughout, common fine prominent light brownish gray (10YR 6/2) moist, irregular iron depletions lining pores; common slickensides; slightly alkaline, pH 7.5 by Hellige-Truog; clear smooth boundary.
Bkss--45 to 53 inches, (114 to 135 cm); light yellowish brown (10YR 6/4) silty clay, brown (10YR 4/3) moist; 41 percent clay; moderate fine angular blocky structure; very hard, very firm, moderately sticky and moderately plastic; few very fine roots; common very fine tubular pores; common fine prominent light brownish gray (10YR 6/2) moist, thread like iron depletions lining pores; few slickensides; common fine distinct white (10YR 8/2) carbonate concretions between peds, common fine distinct white (10YR 8/2) carbonate threads on ped faces and in pores; violently effervescent; slightly alkaline, pH 7.5 by Hellige-Truog; abrupt smooth boundary.
2Bw1--53 to 60 inches, (135 to 152 cm); light yellowish brown (10YR 6/4) silty clay loam, brown (10YR 4/3) moist; 33 percent clay; moderate fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; few fine and common very fine tubular pores; common fine and medium prominent light brownish gray (10YR 6/2) moist, thread like iron depletions lining pores; slightly alkaline, pH 7.8 by hellige-Truog; clear smooth boundary. (5 to 10 inches, (13 to 25 cm) thick)
2Bw2--60 to 70 inches, (152 to 178 cm); very pale brown (10YR 7/4) silty clay loam, dark yellowish brown (10YR 4/4) moist; 29 percent moderate medium subangular blocky structure; slightly hard, very friable, nonsticky and slightly plastic; few very fine roots; common fine tubular pores; common fine and medium prominent light brownish gray (10YR 6/2) moist, thread like iron depletions lining pores; slightly alkaline, pH 7.8 by Hellige-Truog; gradual smooth boundary.
2Bw3--70 to 80 inches, (178 to 203 cm); very pale brown (10YR 7/4) silty clay loam, dark yellowish brown (10YR 4/4) moist; 33 percent clay; moderate medium subangular blocky structure; slightly hard, very friable, nonsticky and slightly plastic; few very fine roots; common very fine and few fine tubular pores; common fine distinct black (N 2/0) moist, irregular manganese masses throughout; slightly alkaline, pH 7.8 by Hellige-Truog; (Combined thickness of the 3Btb2 and 3Btb3 horizon is 15 to 25 inches, (38 to 64 cm) thick).
TYPE LOCATION: Butte County, California; about 5.8 miles southwest of Dayton, approximately 14,620 feet north and 2,050 feet west of the northwest corner of Section 1, Township 19 N., Range 1 W; in an unsectionized area in the Llano Seco Land Grant;39 degrees, 34 minutes, 7 seconds North latitude; 121 degrees, 56 minutes, 12 seconds West longitude, NAD27. U.S.G.S. Quad: Llano Seco, California.
RANGE IN CHARACTERISTICS: Depth to duripan is greater than 80 inches, (203 cm). The mean annual soil temperature is 62 to 64 degrees F, (17 to 18 degrees C). The soil moisture control section is dry from May to October 15 (about 165 days). The particle-size control section averages 40 to 60 percent clay. Mineralogy is dominantly smectitic. Organic matter ranges from 1 to 2 percent to a depth of 45 inches, (114 cm). Reversible surface-initiated cracks 0.25 to 1 inch wide extend to a depth of 33 inches, (84 cm) from June 15 to October 1 (about 105 days) when the soil is not irrigated. Intersecting slickensides range from few to common in the Bss and Bkss horizons from 8 to 53 inches, (20 to 135 cm). A fluctuating water table can occur at depths of 0 to 60 inches, (0 to 152 cm) below the surface of the soil from December through April. Some pedons have thin sandy loam strata between the Ap and the Bss horizons.
The Ap1 horizon dry color is 10YR 5/1, 5/2, 6/2 or 6/3. Moist color is 10YR 3/2, 3/3, 4/1 or 4/2. Clay content ranges from 30 to 40 percent. Rock fragments range from 0 to 5 percent gravel. Redoximorphic features are oxidized iron masses and iron-manganese masses. Reaction ranges from slightly acid to moderately acid due to fertilizer use.
The Ap2 horizon dry color is 10YR 5/1, 5/2 or 5/3. Moist color is 10YR 3/2, 4/2 or 4/3. Texture is silty clay or clay. Clay content ranges from 40 to 45 percent. Rock fragments range from 0 to 5 percent gravel. Redoximorphic features are oxidized iron masses, iron-manganese masses, manganese nodules, and iron depletions. Reaction ranges from slightly acid to neutral.
The Bss horizon dry color is 10YR 5/2, 5/3 or 6/3. Moist color is 10YR 4/2, 4/3 or 4/4. Texture is silty clay or clay. Clay content ranges from 45 to 55 percent. Rock fragments range from 0 to 5 percent gravel. Redoximorphic features are oxidized iron masses, iron-manganese masses, manganese nodules, and iron depletions. Reaction ranges from neutral to slightly alkaline.
The Bkss horizon dry color is 10YR 6/3, 6/4, 5/3, 4/3 or 4/2. Moist color is 10YR 3/3, 3/4 or 4/3. Texture is silty clay or clay. Clay content ranges from 40 to 55 percent. Redoximorphic features are iron-manganese masses and iron depletions. Electrical conductivity ranges from 0 to 2 mmhos/cm. Calcium carbonate ranges from 0 to 1 percent. Reaction ranges from slightly alkaline to moderately alkaline.
The 2Bw horizon dry color is 10YR 6/4 or 7/4. Moist color is 4/3 or 4/4. Texture is silty clay loam or silt loam. Clay content ranges from 18 to 35 percent. Redoximorphic features are iron-manganese masses and iron depletions. Reaction ranges from slightly alkaline to moderately alkaline.
COMPETING SERIES: These are Clear Lake, Carhart, Hildrath and Copus series. Clear Lake soils have hues of 5Y or neutral, chromas of less than 1 in the A horizon, 40 to 60 percent clay in the A horizon, are poorly drained and formed in coastal sediments from sandstone and shale. Carhart soils are moderately deep to paralithic bedrock. Hildrath soils are deep somewhat poorly drained, have C horizon and are underlain by highly weathered metamorphic or granite rock. Copus soils are very poorly drained, have hues of 5Y, 2.5Y and neutral, have 2 to 10 percent gypsum in the Bssy horizon, have EC of 2 to 8 mmhos/cm and have SAR of up to 5 between 10 to 40 inches, (25 to 102 cm).
GEOGRAPHIC SETTING: Dodgeland soils are in overflow channels and in flood basins adjacent to flood plains of the Sacramento River. Slopes range from 0 to 5 percent. These soils formed in alluvium weathered from mixed rocks deposited by the Sacramento River over flood basin alluvium over older floodplain alluvium. Elevation is 105 to 120 feet, (32 to 37 m). Mean annual precipitation is 18 to 20 inches, (457 to 508 mm). The mean annual temperature is 60 to 62 degrees F, (16 to 17 degrees C). Frost free season is 240 to 260 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Esquon, Farwell, Whitecabin, Parrott, Llanoseco and Neerdobe soils. Esquon soils are on basin rims and in flood basins and have a duripan at 40 to 60 inches, (102 to 152 cm). Farwell soils are in overflow channels between flood plains and flood basins, are fine-loamy, and have a Mollic epipedon. Whitecabin soils are in flood basins, have a duripan at 40 to 60 inches, (102 to 152 cm) and are moderately well drained. Parrott soils are on flood plains, are very deep and are fine-silty. Llanoseco soils are in flood basins, are very deep, have less than 30 percent clay in the upper 7 inches, (18 cm) and have an Ochric epipedon. Neerdobe soils are on basin rims and in flood basins, and have a duripan at 20 to 40 inches, (51 to 102 cm).
DRAINAGE AND PERMEABILITY: Poorly drained; very high runoff; moderately slow saturated hydraulic conductivity in the Ap1 horizon, slow in the Ap2, Bss and Bkss horizons and moderately slow to moderate in the 2Bw horizons. The soils are occasionally to frequently flooded for brief periods in December through March. After flood events, water stands in channels for long to very long duration. Water ponds frequently up to 6 inches (15 cm) above the surface for long duration from December through March. A fluctuating water table can occur at depths of 0 to 60 inches, (90 to 152 cm) below the surface of the soil from December through April and is below 40 inches, (102 cm) from June through November.
USE AND VEGETATION: This soil is used for dryland grain, rice production and wildlife habitat.
DISTRIBUTION AND EXTENT: Butte County, California. MLRA 17 - Sacramento Valley. The soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Butte County, California 2005. Source of name from Dodgeland settlement on the Llano Seco Quad.
REMARKS: These soils were previously mapped as Sacramento, Landlow, and Columbia shallow in the Soil Survey of Chico Area, California 1925.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - zone from 0 to 8 inches, (0 to 20 cm) (Ap1 and Ap2)
Cambic horizon - zone from 8 to 53 inches, (20 to 135 cm) (Bss1, Bss2, Bss3, Bkss).
The particle-size control section is 10 to 40 inches (25 to 102cm)
The soil moisture control section is 6 to 19 inches (15 to 48cm)
ADDITIONAL DATA:
80 to 98 inches, (203 to 249 cm): silt loam
98 to 112 inches, (249 to 285 cm): very weakly cemented silt loam with redox features
112 to 122 inches, (285 to 310 cm): very fine sandy loam with durinodes and redox features
122 to 140 inches, (310 to 356 cm): sandy loam over sandy clay loam over sand
140 inches, (356 cm): gravel