LOCATION RIZOZO NM+COEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, calcareous, mesic Lithic Ustic Torriorthents
TYPICAL PEDON: Rizozo loam--rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 5 inches; yellowish red (5YR 4/6) loam, dark red (2.5YR 3/6) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many fine and very fine roots; slightly effervescent; moderately alkaline; abrupt smooth boundary. (2 to 8 inches thick)
Bw--5 to 10 inches; red (2.5YR 4/6) channery silt loam, dark red (2.5YR 3/6) moist; weak medium subangular blocky structure parting to weak fine subangular blocky; slightly hard, friable, slightly sticky, plastic; many fine and very fine roots; 30 percent channers; slightly effervescent; moderately alkaline; abrupt wavy boundary. (2 to 12 inches)
R--10 inches; hard red sandstone bedrock.
TYPE LOCATION: Union County, New Mexico; approximately 100 feet east of the southwest corner of section 30, T. 31 N., R. 34 E.
RANGE IN CHARACTERISTICS:
Soil Moisture - Aridic moisture regime bordering on ustic. Typically, moist in some part of the soil moisture control section, intermittently from May 1 to October 30 and is dry in all parts periodically from November 1 to April 30.
Soil Temperature: 50 to 58 degrees F.
Depth to Bedrock: 4 to 20 inches.
Reaction: slightly alkaline or moderately alkaline.
Particle-size Control Section
Rock fragment content: 0 to 5 percent stones, 0 to 5 percent cobbles, and 5 to 30 percent pebbles and channers. Weighted average is less than 35 percent by volume.
Fine-Earth Fraction: Very fine sandy loam to silt loam.
Sand content: 5 to 25 percent coarser than very fine sand.
Silt plus very fine sand content: 60 to 90 percent.
Clay content: 5 to 25 percent.
A and C Horizons
Hue: 10R to 5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 4 to 6
COMPETING SERIES: These are the
Hideout (UT),
Kenzo (T UT),
Lazear (CO),
Rizno (UT),
Simel (T UT),
Skyvillage (NM),
Tesihim (T AZ), and
Travessilla (NM) series. Potential competitors were a superactive activity class assigned are the
Redspear (WY),
Travson (WY), and
Zukan (UT) series.
Bigmon soils:
Hideout soils: has hue of 7.5YR or 10YR.
Kenzo soils: have a mean annual precipitation of 9 to 12 inches.
Lazear soils: have hue of 7.5YR to 2.5Y.
Rizno soils: have more than 25 percent fine sand or coarser.
Simel soils: average 27 to 35 percent clay in the PSCS.
Skyvillage soils: are dry in
May and June and have hue of 7.5YR to 2.5Y
Tesihim soils: have hue of 10YR and formed from volcanic tuff.
Travessilla soils: have hue of 7.5YR to 2.5Y.
Redspear soils: are not channery in the particle size control section and are moist during the period March through June.
Travson soils: have hue of 10YR.
Zukan soils: have significant accumulations of calcium carbonate in the series control section and have a lithic contact with limestone.
GEOGRAPHIC SETTING:
Parent material: calcareous alluvium, residuum and eolian sediments derived from siltstone and sandstone. Outcrops of sandstone are common on steep slopes.
Landform: cuestas, scarps, and mesas.
Elevation: 4,500 to 7,500 feet.
Slope: 0 to 55 percent.
Mean annual precipitation: 13 to 18 inches, but ranges to a low of 10 inches.
Mean annual temperature: 47 to 57 degrees F.
Frost-free period: 125 to 180 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Alicia, Kim, Manzano and the competing Travessilla soils. Alicia, Kim and Manzano soils do not have bedrock at depths of less than 40 inches.
DRAINAGE AND PERMEABILITY: Well-drained, runoff is high on slopes less than 1 percent and very high on slopes greater than 1 percent; moderate permeability.
USE AND VEGETATION: These soils are used for livestock grazing and wildlife habitat. Vegetation is blue grama, sideoats grama, threeawn species, galleta, snakeweed, juniper and pinyon.
DISTRIBUTION AND EXTENT: Northern New Mexico, southern Colorado, northeastern Texas and the Oklahoma panhandle. LRR G, MLRA 70. The series is extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Union County, New Mexico, 1972.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size Control Section - 0 to 10 inches. (A, C horizons)
Ochric Epipedon - 0 to 5 inches. (A horizon)
Lithic Contact - hard sandstone bedrock at 10 inches. (R horizon)
Taxonomic version: Second edition, 1999