LOCATION HOLMAN NMEstablished Series
TAXONOMIC CLASS: Sandy-skeletal, mixed, frigid Typic Haplustolls
TYPICAL PEDON: Holman very cobbly sandy loam--on an undulating terrace along a major mountain drainageway with a slope of 3 percent in an area with mixed grasses and scattered ponderosa pine at 7,300 feet elevation. When described, the soil was dry throughout. (Colors are for dry soil unless otherwise noted.)
A1--0 to 10 inches; very dark grayish brown (10YR 3/2) very cobbly sandy loam, very dark brown (10YR 2/2) moist; weak medium subangular structure parting to weak fine and medium granular; loose, very friable, slightly sticky and slightly plastic; many fine and medium tubular pores; 5 percent pebbles and 40 percent cobbles; neutral; clear smooth boundary. (10 to 15 inches thick)
A2--10 to 14 inches; brown (10YR 4/3) very cobbly loamy sand, dark brown (10YR 3/3) moist; weak medium subangular blocky structure; loose, very friable, nonsticky and nonplastic; many fine, medium and coarse roots; common fine and medium tubular pores; 10 percent pebbles and 50 percent cobbles; neutral; clear wavy boundary. (0 to 6 inches thick)
C1--14 to 24 inches; yellowish brown (10YR 5/4) extremely cobbly sand, dark yellowish brown (10YR 4/4) moist; single grain; loose, nonsticky and nonplastic; common fine and very fine roots; 20 percent pebbles and 60 percent cobbles; neutral; diffused broken boundary.
C2--24 to 60 inches; yellowish brown (10YR 5/4) extremely cobbly coarse sand, dark yellowish brown (10YR 4/4) moist; single grain; loose, nonsticky and nonplastic; common fine and very fine roots; 20 percent pebbles and 70 percent cobbles; mildly alkaline. (Combined thickness of the C horizons is more than 60 inches.)
TYPE LOCATION: Mora County, New Mexico; along fence line about 1/4 mile west and 250 feet south of Junction NM Highway 3 and Rio La Casa in SW1/4 Sec. 5, T. 20 N., R. 15 E., in the Mora Land Grant.
RANGE IN CHARACTERISTICS:
Soil Moisture: Intermittently moist in some part of the soil moisture control section winter, spring and summer. Never dry in all parts for more than 90 day cumulative.
Soil Temperature: 44 to 47 degrees F.
A horizon: Hue - 10YR or 7.5YR
Value: 3 through 5 dry, 2 or 3 moist
Chroma: 2 or 3
Rock fragments: 10 to 25 percent pebbles and 50 to 80 percent cobbles Reaction: slightly acid to neutral
C horizon: Hue - 7.5YR or 10YR
Value: 4 through 6 dry, 3 through 5 moist
Chroma: 3 or 4
Rock fragments: 10 to 25 percent pebbles and 50 to 80 percent cobbles Reaction: neutral to mildly alkaline
COMPETING SERIES: These are the Riverside and Wabek soils. Riverside soils are dry for more than 90 days cumulative. Wabek soils are calcareous above 40 inches.
GEOGRAPHIC SETTING: Holman soils are on stream terraces. Slopes range from 0 to 8 percent. The soils formed in alluvium derived dominantly from sandstone and quartz. Elevations range from 7,200 to 8,500 feet. Mean annual temperature ranges from 42 to 46 degrees F., and mean annual precipitation ranges from 16 to 20 inches. The frost-free period ranges from 90 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brycan, Ceboya, Hesperus, Kinesava, and Moreno soils. Brycan and Hesperus soils have fine-loamy control sections. The Ceboya soils are saturated at least part of the year. Kinesava and Moreno soils have more than 35 percent clay in their control sections.
DRAINAGE AND PERMEABILITY: Excessively drained; slow runoff; rapid permeability.
USE AND VEGETATION: The Holman soils are used for grazing livestock, woodland, wildlife, and recreation. Vegetation is mainly blue grama, stipas, ring muhly, threeawn, forbs, and coniferous trees in some areas.
DISTRIBUTION AND EXTENT: The Holman soils are not extensive. They occur in northern New Mexico.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Mora County, New Mexico, 1981.
REMARKS: Diagnostic horizons and features recognized in this pedon are: Mollic epipedon: 0 to 14 inches