LOCATION PLEIOVILLE NMEstablished Series
TAXONOMIC CLASS: Clayey-skeletal, smectitic, frigid Typic Haplustalfs
TYPICAL PEDON: Pleioville gravelly loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 2 inches; dark yellowish brown (10YR 4/4) gravelly loam, dark brown (10YR 3/3) moist; moderate fine granular structure; slightly hard, friable, nonsticky and nonplastic; common fine and many very fine roots; 25 percent pebbles; neutral (pH 6.6); abrupt smooth boundary. (2 to 6 inches thick)
Bt1--2 to 6 inches; brown (7.5YR 4/4) gravelly clay loam, dark brown (7.5YR 3/2) moist; weak fine subangular blocky structure; hard, firm, sticky and plastic; few medium, common fine and many very fine roots; common fine tubular pores; few thin clay films on faces of peds and lining pores; 25 percent pebbles; neutral (pH 6.8); clear smooth boundary. (4 to 6 inches thick)
Bt2--6 to 12 inches; reddish brown (5YR 4/4) gravelly clay, dark reddish brown (5YR 3/4) moist; moderate medium blocky structure; hard, firm, sticky and plastic; common fine and very fine roots; common fine tubular pores; common thin clay films on faces of peds and lining pores; 30 percent pebbles; neutral (pH 6.8); clear wavy boundary. (5 to 8 inches thick)
Bt3--12 to 16 inches; yellowish red (5YR 5/6) very gravelly clay, yellowish red (5YR 4/6) moist; moderate medium blocky structure; hard, firm, sticky and plastic; few fine and common very fine roots; common fine tubular pores; common moderately thick clay films on faces of peds and lining pores; 50 percent pebbles; neutral (pH 6.8); clear wavy boundary. (0 to 9 inches thick)
Bt4--16 to 24 inches; light reddish brown (5YR 6/4) very gravelly clay loam, yellowish red (5YR 5/6) moist; weak medium subangular blocky structure; hard, firm, sticky and plastic; few fine and very fine roots; few fine tubular pores; few thin clay films on faces of peds and on pebbles; 55 percent pebbles; slightly alkaline (pH 7.6); clear wavy boundary. (6 to 11 inches thick)
R--24 inches; cemented volcanic conglomerate composed mainly of andesite, basalt, tuff, and other rocks.
TYPE LOCATION: Catron County, New Mexico; about 3-1/2 miles southeast of the junction of state road 78 and Forest Service road 951. East of Corduroy Canyon in the northwest 1/4, southeast 1/4, sec. 36. T. 7 S., R. 10 W; 107 degrees, 49 minutes, 56 seconds west longitude and 33 degrees, 39 minutes, 15 second north latitude.
RANGE IN CHARACTERISTICS:
Soil Moisture: Intermittently moist in some part of the soil moisture control section July through September and December through April. Typic ustic moisture regime.
Soil Temperature: 42 to 47 degrees F.
Depth to bedrock: 20 to 40 inches
Rock fragments: 35 to 50 percent in the particle-size control section on a weighted average dominantly pebbles
A horizon
Hue: 5YR, 7.5YR, or 10YR
Value: 3 or 4 dry, 2 or 3 moist
Chroma: 3 or 4
Texture: sandy loam, loam, or clay loam with gravelly modifiers.
Bt horizon
Hue: 5YR or 7.5YR
Value: 4 or 5 dry, 3 to 5 moist
Chroma: 4 to 6.
COMPETING SERIES: These are the
Fishers (CO),
Pinacol (CO) and
Ring(NM) series.
Fishers, Pinacol and Ring soils are very deep.
GEOGRAPHIC SETTING: Pleioville soils are on plains. Slopes are 3 to 15 percent. Elevation ranges from 7,400 to 8,000 feet. These soils formed in gravelly local alluvium derived from volcanic conglomerates and tuff. The average annual precipitation is about 14 to 19 inches; the average annual temperature is about 40 to 45 degrees F. The frost-free period is 100 to 120 days. In Colorado slopes range as high as 65 percent and also occur on backslopes.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Adman, Bario, Manzano, and Smilo soils. Adman, Manzano, and Smilo soils have mollic epipedons. Bario soils are more than 40 inches to bedrock.
DRAINAGE AND PERMEABILITY: Well drained, rapid runoff, slow permeability.
USE AND VEGETATION: Pleioville soils are used for grazing. Present vegetation is blue grama, mountain muhly, pine dropseed, and fringed sagewort.
DISTRIBUTION AND EXTENT: Southwestern New Mexico. This series is of moderate extent. MLRA 39.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Catron County, New Mexico, 1982.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: 0 to 2 inches
Argillic horizon: 2 to 24 inches
Lithic contact: 24 inches
Mollic feature: color value is 5 or less dry and 3 or less moist after mixing the upper 7 inches