LOCATION PROGRESSO CO+AZ NMEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Ustic Calciargids
TYPICAL PEDON: Progresso loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 7 inches; reddish brown (5YR 5/4) loam, dark reddish brown (5YR 3/4) moist; weak fine granular structure; slightly hard, very friable, slightly sticky and plastic; slightly alkaline; clear smooth boundary. (4 to 8 inches thick)
Bt--7 to 14 inches; reddish brown (5YR 5/4) clay loam; reddish brown (5YR 4/4) moist; weak medium subangular structure; hard, friable, slightly sticky and plastic; slightly alkaline; clear smooth boundary. (4 to 10 inches thick)
Btk--14 to 24 inches; reddish brown (5YR 5/4) clay loam, yellowish red (5YR 4/6) moist; moderate medium subangular blocky; hard, friable, slightly sticky and plastic; lime segregated in common fine irregularly shaped soft masses; violently effervescent; moderately alkaline; gradual wavy boundary. (6 to 10 inches thick)
Bk--24 to 36 inches; white (5YR 8/1) loam, pink (5YR 7/4) moist; massive; hard, very friable, slightly sticky and plastic; 10 percent pebbles; lime disseminated throughout and on pebbles as thick pendants; calcareous; moderately alkaline; abrupt wavy boundary. (6 to 12 inches thick)
R--36 inches; hard sandstone.
TYPE LOCATION: Montrose County, Colorado; about 100 feet east and 2,300 feet north of the southwest corner of Sec. 16, T. 48 N., R. 17 W.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature ranges from 47 to 52 degrees F. Depth to bedrock ranges from 20 to 40 inches. Depth to calcareous material ranges from 8 to 24 inches. The moisture control section is moist in some part less than one-half the time the soil temperature is above 41 degrees F., and is dry in all parts for 15 consecutive days from May 15 to June 15. Coarse fragments range from 0 to 15 percent and are dominantly pebble-sized.
A horizon has hue of 2.5Y through 5YR, value of 4 through 6 dry, 3 or 4 moist, and chroma of 2 through 6. Soil reaction is neutral or slightly alkaline.
Bt horizon has hue of 2.5Y through 5YR, value of 4 through 6 dry, 4 or 5 moist, and chroma of 3 through 6. It is typically clay loam or sandy clay loam and has 18 to 35 percent clay. Soil reaction is neutral through moderately alkaline.
Bk horizon has hue of 2.5Y through 5YR, value of 5 through 8, 4 through 7 moist, and chroma of 1 through 6. It has common, medium to coarse, soft to hard, lime bodies and lime pendants on pebbles as well as disseminated lime. Texture is loam or sandy clay loam. Calcium carbonate equivalent ranges from 15 to 35 percent. Some pedons have a thin paralithic layer above the bedrock.
COMPETING SERIES: These are the Balon, Barx, Bowbac, Buckle, Cambria, Cerrillos, Clovis, Cushman, Fattig, Fernando, Decolney, Flaco, Forkwood, Fort Collins, Gaddes, Gapbutte(T), Hagerman, Harbord, Hiland, Los Alamos, Maysdorf, Millet, Oelop, Olney, Palacid, Penistaja, Pokeman, Potts, Pugsley, Scholle, Spangler, Spenlo, Stoneham, Sundance, Tapia, Threetop, Toluca, Tuweep, and Yenlo series. Balon, Barx, Bowbac, Buckle, Cambria, Cerrillos, Clovis, Decolney, Fernando, Forkwood, Fort Collins, Gaddes, Harbord, Hiland, Los Alamos, Maysdorf, Millett, Oelop, Olney, Palacid, Penistaja, Pokeman, Potts, Pugsley, Scholle, Spenlo, Stoneham, Tapia, Toluca, Tuweep, and Yenlo soils lack lithic contacts within depths of 40 inches. Cushman and Hagerman soils lack a calcic horizon below the argillic horizon. Fattig soils have chroma of 1 in the Bt horizon. Flaco soils have mean annual soil temperatures greater than 52 degrees F. Gapbutte soils have less than 15 percent calcium carbonate equivalent. Spangler soils have a paralithic contact above depths of 40 inches. Sundance soils have lithologic discontinuities. Threetop soils have soil moisture control sections that are moist in some or all parts in May and June.
GEOGRAPHIC SETTING: Progresso soils are on old terraces, benches, mesas, and upland hills and ridges. The soil formed in alluvium derived from sandstone or limestone. Slopes range from 0 to 15 percent. Elevation ranges from 5,300 to 6,800 feet. The mean annual precipitation ranges from 12 to 15 inches. Mean annual air temperature ranges from 45 to 49 degrees F. In Arizona mean annual air temperatures reach 57 degrees F., mean annual precipitation is as low as 10 inches, and the frost-free period extends to 165 days. The average frost-free period ranges from 90 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Barx soils and the Pinon soils. Pinon soils have hard bedrock at depths above 20 inches.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderate permeability.
USE AND VEGETATION: This soil is used mainly for rangeland. A few areas are irrigated and produce corn for silage, small grains, alfalfa, and grass hay. Native vegetation consists mainly of galleta, Indian ricegrass, needleandthread, and Wyoming big sage.
DISTRIBUTION AND EXTENT: Western Colorado, northern Arizona and adjacent parts of New Mexico. The series is of moderate extent.
SERIES ESTABLISHED: Reconnaissance Upper Rio Puerco, New Mexico, Soil Conservation Service, 1940.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from 0 to 7 inches
Argillic horizon - the zone from 7 to 24 inches.
Lithic contact - the boundary with sandstone at 36 inches.
Ustic feature - soil moisture regime and organic carbon content meets the requirements for Ustic intergrades.