|
• 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
<br />reaction is neutral or slightly alkaline.
<br />Bt horizon has hue of 2.SY through 5YR, value of 4 through 6 dry, 4 or 5 moist, and chroma of 3 through 6. h is
<br />typically Gay loam or sandy Gay loam and has 18 to 35 percent clay. Soil reaction is neutral through moderately
<br />alkaline.
<br />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
<br />common, medium to coarse, soft to hard, lime bodies and lime pendants on pebbles as well as disseminated lime.
<br />Texture is loam or sandy day loam. Calcium carbonate equivalent ranges from 15 to 35 percent. Some pedons
<br />have a thin paralithic layer above the bedroG<.
<br />COMPETING SERIES: These are the Balon, Banc, Bowbac, Buckle, Cambria, Cerrillos, Clovis, Cushman, Fattig,
<br />Femando, Decolney, Flaco, Forkwood, Fort Collins, Gaddes, Gapbutte(T), Hagerman, Harbord, Hiland, Los
<br />Alamos, Maysdort, Millet, Oelop, Olney, Palacid, Penistaja, Pokeman, Potts, pugsley, Scholle, Spangler, Spenlo,
<br />Stoneham, Sundance, Tapia, Threetop, Toluca, Tuweep, and Yenloseries. Balon, Banc, Bowbac, BuG<le, Cambria,
<br />Cerrillos, Clovis, Decolney, Femando, Forkwood, Fort Collins, Gaddes, Harbord, Hiland, Los Alamos, Maysdorf,
<br />Millett, Oetop, Olney, Palacid, Penistaja, Pokeman, Potts, Pugsley, Scholle, Spenlo, Stoneham, Tapia, Toluca,
<br />Tuweep, and Yenlo soils lack lithic contacts within depths of 40 inches. Cushman and Hagerman soils lack a calcic
<br />horizon below the argillic horizon. Fattig soils have chroma of 1 in the Bt horizon. Flaco soils have mean annual soil
<br />• temperatures greater than 52 degrees F. Gapbutte soils have less than 15 percent calcium carbonate equivalent.
<br />Spangler soils have a paralithic contact above depths of 40 inches. Sundance soils have lithologic discontinuities.
<br />Threetop soils have soil moisture control sections that are moist in some or all parts in May and June.
<br />GEOGRAPHIC SETTING: Progresso soils are on old terraces, benches, mesas, and upland hills and ridges. The
<br />soil formed in alluvium derived from sandstone or limestone. Slopes range from 0 to 15 percent. Elevation ranges
<br />from 5,300 to 6,800 feet. The mean annual precipitation ranges from 12 to 15 inches. Mean annual air temperature
<br />ranges from 45 to 49 degrees F. In Arizona mean annual air temperatures reach 57 degrees F., mean annual
<br />precipitation is as low as 10 inches, and the frost-free period extends to 165 days. The average frost-free period
<br />ranges from 90 to 130 days.
<br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Banc soils and the Pinon soils. Pinon soils
<br />have hard bedrock at depths above 20 inches.
<br />DRAINAGE AND PERMEABILfTY: Well drained; slow to medium runoff; moderate permeability.
<br />r ~
<br />LJ
<br />(Revised March 2006) Attachment 2.04.9-3-29
<br />
|