PERMFILE62688

• Permit No: C1981024
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 3 SOILS INFORMATION
• Media Type: D
• Archive: No

• SOIL MAPPING UNIT - FORT COLLINS LOAM
FcD - Fort Collins, loam, 3 to 9 percent slopes. This deep, well
drained soil is on uplands. It formed in eoliaa silt and fine sand.
The native vegetation is mainly grass. Elevation is 5,500 to 6,300
feet. The average annual precipitation is 12 to 16 inches, the average
annual air temperature is 50 to 54 degrees F, and the average frost-free
period is 125 to 150 days.
Typically, the surface layer is grayish brown loam about 4 inches thick.
The subsoil is clay loam about 19 inches thick. The substratum to a
depth of 60 inches or more is loam. The soil is neutral to a depth of 4
inches, mildly alkaline to a depth of 23 inches, and moderately alkaline
below that depth.
Included in this unit is about 10 percent Olney sandy loam on ridges.
Also included are small areas of Baca loam is swales.
• Permeability of this Fort Collins soil is moderate. Available valet
capacity is high. Effective rooting depth is 60 inches or more. Runoff
is rapid, and the hazard of water erosion is moderate to very high.
Most areas of this unit are used for rangeland. A few areas are used
for irrigated and nonirrigated cropland. Hay and pasture are the main
irrigated crops. Wheat is the main nonirrigated crop. Areas of
nonirrigated cropland are highly susceptible to water and soil blowing
and generally should be reseeded to grass.
The potential plant community on this unit ie mainly blue grams. Other
less numerous grasses that characterize this site are western vheatgrasa
and sideoats grams. The average annual production of air-dry vegetation
is about 800 pounds per acre. If the condition of the range
deteriorates, thzeeawn, snakeweed, cholla, and pricklypear increase.
Range seeding is suitable if the range is in poor condition.
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