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PROGRESSO SERIES <br />LOCATION PROGRESSO CO +AZ NM <br />Established Series <br />Rev. BDS /GB /RLB <br />8/97 <br />The Progresso series consists of moderately deep, well drained soils formed in alluvium derived from <br />sandstone or limestone. Progresso soils are on old terraces, benches, mesas, and upland hills and <br />ridges. Slopes range from 0 to 15 percent. The mean annual precipitation is about 14 inches and the <br />mean annual temperature is about 46 degrees F. <br />TAXONOMIC CLASS: Fine - loamy, mixed, superactive, mesic Ustic Calciargids <br />TYPICAL PEDON: Progresso loam - rangeland. (Colors are for dry soil unless otherwise noted.) <br />A--0 to 7 inches; reddish brown (5YR 5/4) loam, dark reddish brown (5YR 3/4) moist; weak fine granular <br />structure; slightly hard, very friable, slightly sticky and plastic; slightly alkaline; clear smooth boundary. <br />(4 to 8 inches thick) <br />Bt - -7 to 14 inches; reddish brown (5YR 5/4) clay loam; reddish brown (5YR 4/4) moist; weak medium <br />subangular structure; hard, friable, slightly sticky and plastic; slightly alkaline; clear smooth boundary. <br />(4 to 10 inches thick) <br />Btk - -14 to 24 inches; reddish brown (5YR 5/4) clay loam, yellowish red (5YR 4/6) moist; moderate <br />medium subangular blocky; hard, friable, slightly sticky and plastic; lime segregated in common fine <br />irregularly shaped soft masses; violently effervescent; moderately alkaline; gradual wavy boundary. (6 <br />to 10 inches thick) <br />Bk - -24 to 36 inches; white (5YR 8/1) loam, pink (5YR 7/4) moist; massive; hard, very friable, slightly <br />sticky and plastic; 10 percent pebbles; lime disseminated throughout and on pebbles as thick pendants; <br />calcareous; moderately alkaline; abrupt wavy boundary. (6 to 12 inches thick) <br />R--36 inches; hard sandstone. <br />TYPE LOCATION: Montrose County, Colorado; about 100 feet east and 2,300 feet north of the <br />southwest corner of Sec. 16, T. 48 N., R. 17 W. <br />RANGE IN CHARACTERISTICS: <br />Mean annual soil temperature ranges from 47 to 52 degrees F. Depth to bedrock ranges from 20 to 40 <br />inches. Depth to calcareous material ranges from 8 to 24 inches. The moisture control section is moist <br />in some part less than one -half the time the soil temperature is above 41 degrees F., and is dry in all <br />parts for 15 consecutive days from May 15 to June 15. Coarse fragments range from 0 to 15 percent <br />and are dominantly pebble- sized. <br />A horizon has hue of 2.5Y through 5YR, value of 4 through 6 dry, 3 or 4 moist, and chroma of 2 through <br />6. Soil reaction is neutral or slightly alkaline. <br />Bt horizon has hue of 2.5Y through 5YR, value of 4 through 6 dry, 4 or 5 moist, and chroma of 3 <br />through 6. It is typically clay loam or sandy clay loam and has 18 to 35 percent clay. Soil reaction is <br />neutral through moderately alkaline. <br />Bk horizon has hue of 2.5Y through 5YR, value of 5 through 8, 4 through 7 moist, and chroma of 1 <br />through 6. It has common, medium to coarse, soft to hard, lime bodies and lime pendants on pebbles <br />as well as disseminated lime. Texture is loam or sandy clay loam. Calcium carbonate equivalent ranges <br />from 15 to 35 percent. Some pedons have a thin paralithic layer above the bedrock. <br />Attachment 2.04.9 -3 -26 <br />