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Do we Flats Quarry Soils and Geology Report <br /> Mean summer soil temperature ranges from 19 to 25 degrees C. (67 to 76 degrees F.) <br /> Depth to carbonates: calcareous at the surface but may be leached for 5 to 10 centimeters (2 to 4 <br /> inches) in some pedons. <br /> Depth to visible calcium carbonate accumulations: 8 to 38 cm (3 to 15 inches) <br /> Calcium carbonate equivalent: 15 to 40 percent in at least one horizon above a depth of 100 cm <br /> (40 inches). <br /> Electrical conductivity: 0.5 to 8 dS/m <br /> Particle size control section: (Weighted average) <br /> Clay content: 18 to 27 percent <br /> Silt content: 40 to 70 percent <br /> Sand content: 5 to 35 percent, with less than 15 percent fine or coarser sand <br /> Rock fragment content: 0 to 5 percent in the control section <br /> A horizon: <br /> Hue: IOYR to 2.5Y <br /> Value: 5 or 6 dry, 3 to 5 moist <br /> Chroma: 2 to 4 <br /> Texture: silt loam or loam <br /> Clay content: 18 to 27 percent <br /> Reaction: slightly alkaline to strongly alkaline <br /> Bk horizons: (Bw in some pedons) <br /> Hue: 7.5YR to 2.5Y <br /> Value: 5 to 8 dry, 4 to 6 moist <br /> Chroma: 3 to 6 <br /> Texture: silt loam, loam, clay loam or silty clay loam <br /> Clay content: 15 to 35 percent but is typically 18 to 27 percent. <br /> Reaction: moderately alkaline to strongly alkaline <br /> Calcium carbonate equivalent: 10 to 40 percent <br /> Rock fragment content: 0 to 5 percent above a depth of 100 cm (40 inches), 0 to 15 percent <br /> below 100 cm. <br /> COMPETING SERIES: These are the Minnequa (CO), and Willard (NM) series. <br /> Minnequa soils: have a paralithic contact at depths of 50 to 100 centimeters (20 to 40 inches). <br /> Willard soils: are in MLRA 70, are dry in March and intermittently moist in April and May, <br /> formed in lacustrine deposits, have iron masses in the Bw, and salt crystals in the Bk horizons. <br /> GEOGRAPHIC SETTING: <br /> Landform: fans and plains, interfluves <br /> Slopes: 0 to 15 percent. <br /> Parent material: calcareous alluvium derived from chalk, shale and soft limestone. <br /> Average annual precipitation: 254 to 356 millimeters (10 to 14 inches) <br /> wettest period: May through August <br /> Driest period: December through February <br /> Average annual air temperature: 9 to 14 degrees C. (48 to 57 degrees F.) <br /> 11 May 2, 2022 <br />