Laserfiche WebLink
BEGAY SERIES <br />LOCATION BEGAY UT +AZ, CO <br />Established Series <br />Rev. RLM /GWL/RLB <br />4/98 <br />The Begay series consists of very deep, well drained, moderately rapidly permeable soils that <br />formed in eolian deposits, derived mainly from sandstone. Begay soils are on structural benches <br />and broad mesas and have slopes of 0 to 30 percent. The average annual precipitation is about 12 <br />inches, and the mean annual temperature is about 48 degrees F. <br />AXONOMIC CLASS: Coarse - loamy, mixed, superactive, mesic Ustic Haplocambids <br />TYPICAL PEDON: Begay loamy fine sand, rangeland. (Colors are for air -dry soil unless otherwise <br />noted.) <br />A--0 to 3 inches; yellowish red (5YR 5/6) loamy fine sand, yellowish red (5YR 4/6) moist; single <br />grained; loose; very slightly effervescent, carbonates are disseminated; moderately alkaline (pH <br />7.9); clear smooth boundary. (2 to 5 inches thick) <br />Bw - -3 to 16 inches; yellowish red (5YR 5/6) very fine sandy loam, yellowish red (5YR 4/6) moist; <br />weak medium subangular blocky structure; soft, friable; common fine roots; few fine pores; slightly <br />alkaline (PH 7.8); clear wavy boundary. (11 to 17 inches thick) <br />Bkl - -16 to 28 inches; yellowish red (5YR 5/6) very fine sandy loam, yellowish red (5YR 4/6) moist; <br />weak medium subangular blocky structure; slightly hard, firm; few fine roots; common fine pores; <br />very slightly effervescent, carbonates are disseminated; moderatey alkaline (pH 7.9); gradual wavy <br />boundary. (10 to 14 inches thick). <br />Bk2--28 to 42 inches; yellowish red (5YR 5/6) very fine sandy loam, yellowish red (5YR 4/6) moist; <br />weak medium subangular blocky structure; slightly hard, firm; few fine roots;common fine pores; <br />very slightly effervescent; carbonate strongly effervescent, moderately alkaline (pH 8.0); gradual <br />wavy boundary. (12 to 16 inches thick) <br />C--42 to 60 inches; yellowish red (5YR 5/8) very fine sandy loam, yellowish red (5YR 4/8) moist; <br />massive; soft, very friable; few fine pores; very slightly effervescent, carbonates are disseminated; <br />strongly alkaline (pH 8.1). <br />TYPE LOCATION: San Juan County, Utah; 7 miles east and 5 miles north of Navajo Mountain <br />School; SW 1/4, SE 1/4 sec. 31, T. 42 S., R. 17 E. <br />RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 47 to 57 degrees <br />F. The mean summer soil temperature at a depth of 20 inches ranges from 61 to 65 degrees F. In 7 <br />out of 10 years the soils are dry in all parts of the moisture control section for 50 to 75 percent of the <br />time (cumulative) that the soil temperature at depth of 20 inches is above 41 degrees F. The soils <br />are moist in some part of the moisture control section for 30 to 40 days during the summer and are <br />dry in some part of the moisture control section for 60 to 90 consecutive days during winter and <br />early spring and are moist in some parts between July and October. <br />The combined thickness of the A and B horizons is 35 to 50 inches. The depth to secondary <br />carbonates ranges from 12 to 22 inches. The series particle -size control section ranges from 15 to <br />40 percent fine sand or coarser and 0 to 15 percent rock fragments. <br />The A horizon has hue of 2.5YR through 10YR, value of 4 through 6 dry, 3 through 5 moist, and <br />Revised September 2010 (PRO6) Attachment 2.04.9 -3 -5 <br />