HomeMy WebLinkAbout950444.tiff 132 SOIL SURVEY
TABLE 14.--SOIL AND WATER FEATURES
[Absence of an entry indicates the feature is not a concern. See text for descriptions of symbols and such
terms as "rare," "brief," and "perched." The symbol < means less than; > means greater than]
Flooding High water table Bedrock
Soil name and Hydro- i Potential
map symbol logic Frequency Duration ;Months Depth I Kind Months Depth Hard- frost
group ness action
Ft In
1, 2 B None --- --- >6.0 --- --- >60 --- Moderate.
Altvan
3*:
Aquolls D Frequent---- Brief Apr-Jun 0.5-1 .0 Apparent Apr-Jun >60. --- High.
Aquents D Frequent---- Brief Apr-Jun 0.5-1.0 Apparent Apr-Jun >60 --- High.
4*:
Aquolls D Frequent---- Brief Apr-Jun 0.5-1.51Apparent Apr-Jun >60 --- High.
Aquepts D Frequent---- Brief Apr-Jun 0.5-1.5;Apparent,Apr-Jun >60 --- High.
5, 6, 7, 8, 9 B None --- --- >6.0 --- --- >60 --- Moderate.
Ascalon
10 A Frequent---- Brief Mar-Jun >6.0 --- --- >60 --- Low.
Bankard
11 , 12 B None --- --- >6.0 --- --- >60 --- Moderate.
Bresser
13 A None --- --- >6.0 --- --- >60 --- Low.
Ca sca jo
14, 15, 16, 17---- B None . --- --- >6.0 --- --- >60 --- Low.
Colby
18*:
Colby B None --- --- >6.0 --- --- >60 --- Low.
Adena C None --- --- >6.0 --- --- >60 --- Low.
19, 20 B Rare --- --- >6.0 --- --- >60 --- Moderate.
Colombo
21 , 22 C None --- --- >6.0 --- --- >60 --- Low.
Dacono
23, 24 B None to rare --- --- >6.0 --- --- >60 --- Low.
Fort Collins
25, 26 B Rare to Brief May-Sep >6.0 --- --- >60 --- Low.
Haverson common.
27, 28 C None --- --- >6.0 --- --- >60 --- Low.
Heldt
29, 30 A None --- --- >6.0 --- --- >60 --- Moderate.
Julesburg
31 , 32, 33, 34---- B None --- --- >6.0 --- --- >60 --- Low.
Kim
35*:
Loup D Rare to Brief Mar-Jun +.5-1.5 Apparent Nov-May >60 --- Moderate.
common.
Boel A Occasional Brief Mar-Jun 1 .5-3.5 Apparent Nov-May >60 --- Moderate.
36*:
Midway D None --- --- >6.0 --- --- 10-20 Rip- Low.
pable
See footnote at end of table.
950444
129
.,D COUNTY, COLORADO, SOUTHERN PART
TABLE 13.--PHYSICAL AND CHEMICAL PROPERTIES OF SOILS ':
[The symbol < means less than; > means greater then. The erosion tolerance factor (T) is for the entire
profile. Absence of an entry means data were not available or were not estimated]
Risk of corrosion ; Erosi"iwind
--- — I factors;erodi-
' -Ibility
ISalinity; Shrink- '', N ', T_ roup_
swell ';uncoated ;Concrete
Soil name and ;Depth; Perme a- Ica ateble reaotion �'1 otential 1 steel E 1 symbol bility
map �'capacit ;Mmhos/cm;
In In/hr In/in 2 5
Low Moderate ;Low----__�10
6.6-7.8 8
I� -<2 ,I Moderate ILow---- ', t
10.241 3
'0.281
___; p-101 0.6-2.0 10.20-0.24; Low----��-';Moderate 'Low------'0• p
,
;Moderate � '�
1 , p__---------- 0.>20.0 10.02-0.171 7.4-9.4
Altvan ,10-25 >20 ;�p,02-0.04; 7• 9•
4_ p <2
;25-601 --' ___
d to___ ____ __ era _____
3 D-481 4_8 4 2-16 w____ g __
A quolls___________, >20 '0.04-0.06; 7. � ______ _________ ___ ___ _
,
,
{48-60 , ___ __
,
,
o h
,
;L ;Hi
, --- --- __ derate -
, i --- ' ;High
__
42-16 ;Lou
,H IMo
0- 8, I
Aquents___________�48-60; >20 ;0.04-0.061 7.4-8.4 , ,
4*:
0-601 _ _________
Aquolls___________ ,
Aquepts___________'' 0-60'1 'Low___ 0.17; 5
<2 ;Low w______, 0.241
;Moderate ILow------'
p_8 ; 0.6-2.0 10.11-0.151 6.6-7.8 I <2 ;Moderate
5, 6, 7, 8, 9______' <2 l tow_______'IModerate Low------10.241 1' 3
Ascalon ; 8-181 0.6-2.0 ;0.13-0.151 6.6-7.8
118-601 0.6-6.0 10.11-0.151 7.9-B•4 I 'Moderate ILow-----X0.10; 5 I
0-4 II 2.0-6.0 10.09-0.121 7.4 8.4 1 <2 ILow_______;Moderate Itow------;0.101 2
;Low-______,1
10_________________� 4-601 6.0-20 10.05-0.081 7. ILow______;0.101 5
Bankard 12rd _ ,Low-----
', ' 'Low 'Moderate ;Low----- 0
6_251 0.6-2.0 10.11-0.181 6.1-7.3 I ILow 'Low------10.151
11 , t2_______'_'_{ 0.6-6.0 ;0.10-0.13; 6.6-7.3 ;L0W__-___--Low---___' 10.101 ;
Bresser 130-251 6.6-7.3 --_ 'tow------''Low------' 1
{25-301 0.6-6.0 10.00-0.131 6.6-7.3 ;Lou------- '
;30_60; 2.0-20 ;0.05-o.oe{
<2 'Moderate ;Low------ 0 8
7.4-8.4 ; ,Low___-___,
.10, 5 I
9- ; 6.0-20 10.05-0.08; 4-8.4 ' <2 Moderate Low-- 0.10,
13_________________' 6.0-20 10.05-0.061 7. <2 Low_______,1Moderate Low______'10.37
,Lou-------' 0.101
9-30 { 4-8.4 ILow " 5 4L
Casc a,jo 1131_601 6.0-20 10.05-0.061 7. I'
� <2 'Moderate ,Low------'
derate ILow------�
<2 Mo
14, 15, 16, 17_____; 0-7 ; 0.6-2.0 10.20-0.241 6.4_g,44L
,Low-------'
Colby ; 7-60; 0.6-2.0 10.17-0.22; 7.
1 1
,Low-------��Moderate �ILou------'0
18': _1; 0_7 1 0.6-2.0 10.20-0.241 6.6-8.4 <2 'Moderate ;Low------'o
5
4-8.4 I <2 ILow_______', 10.711
Colby____________ 17-601 0.6-2.0 10.17-0.221 7• 5
<2 ;Low-------{Moderate '1;Low______,
High----- ,It 1
; p_6 ; 0.6-2.0 10.18-0.211 6.6-7.8 I <2 'High______;Hig h_____,Low______,0.
Adena_____________1I 6_y 1 0.6-2.0 10.16-0.181 7.4 8.4 11 <2 {Low_______,' 1 321 1
21 5
9-60{ 0.6-2.0 lo.t6-o.t8{ 7. ;Low------'0.3 5
' 4 1 <2 ILow
o-_______;High_____ , ______
4-14'1 0.6-2.0 10.14-0.161 7.u-8.4 1 <2 ;Moderate (High-----;Low .2
19, 20_____________, _;High_____;Itow______�10 5
.28
8;
;14-211 0.6-2.0 ;0.14-0.16; 7.4_g,4 <2 ;Low------
Colombo ;21-601 0.6_2,0 ;0.14-0.16; 7•
;Low------ 0.241 3
2-211 0.2-0.6 ;0.15-0.21 '1 7.4-8.4 ; <2 ;High
High----rate ;High-----;tow______10.24'1
4 IHi h______''Hi h_____ ; ';0.151
;
;0.13-0. 1 1 7• Moderate H ;0.151
21 , 22_____________ 112-21 , 0.2-0.6 4_8.4 <2 ; ;High D acono ;21-271 0.>20.0 ;0.13-0.15'1 7.4-8.4 <2 Low------- g , 6
;27-60 >20 10.03-0.051 7.
' ,I <2 :Low Moderate Itow------10 5
1 0.6-2.0 0.16-0. 181 7.4-7.8 0.2
', ; <2 Moderate Moderate ;Low------'0
201 ;
.201 ';
IL ow 0, '
Low-------�
;
23, 24-----' -- ; 0-7 0.6-2.0 '10.16-0.181 7.4-7.8 ;High----- 4L
601 0.6-2.0 ;0.16-0.181 7.4-8.4 1 <2 1
111 ;0.281 5
Fort Collins ; 7' igh_____;Low------
111-4
1 ; _ ;Low_______;High-----{ILow------';0.281
4_4 1 0.6-2.0 10.14-0.18'1 7. '1 <8 ILow_______; h_____, 4
25, 26-�---- ------� 4-601 0.6-2.0 10.14-0.18; 7.4-8.4 ; '0.281 5
, ;Hog ig _____
Haverson 2 son 9 0 ; <8 {High------ , ;H
h
0_6010.06-0.6 10.12-0.1711 7.9- ' ; ,
27, 28_____________,1 ;
Heldt I
See footnote at end of table.
950444
104 SOIL SURVEY
TABLE 7.--SANITARY FACILITIES
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "slight," "moderate," "good," "fair," and other terms used to rate soils.
Absence of an entry means soil was not rated]
Soil name and Septic tank Sewage lagoon Trench Area Daily cover
map symbol absorption areas sanitary sanitary for landfill
fields landfill landfill
1 , 2 Slight Severe: Severe: Slight Fair:
Altvan seepage. seepage. thin layer.
3*:
Aquolls Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
Aquents Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
4*:
Aquolls Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness, wetness.
Aquepts Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
5, 6 Slight Severe: Severe: Severe: Good.
Ascalon seepage. seepage. seepage.
7 Slight Severe: Severe: Severe: Good.
Ascalon slope, seepage. seepage.
seepage.
8, 9 Slight Severe: Severe: Severe: Good.
Ascalon seepage. seepage. seepage.
10 Severe: Severe: Severe: Severe: Fair:
Bankard floods. floods, floods, floods. too sandy.
seepage. seepage.
11 , 12 Slight Severe: Severe: Severe: Good.
Bresser seepage. seepage. seepage.
13 Moderate: Severe: Severe: Severe: Poor:
Cascajo slope, slope, seepage. seepage. small stones.
seepage,
small stones.
14, 15, 16 Slight Moderate: Slight Slight Good.
Colby seepage.
17 Slight Severe: Slight Slight Good.
Colby slope.
18*:
Colby Slight Severe: Slight Slight Good.
slope.
Adena Moderate: Moderate: Slight Slight Good.
peres slowly. seepage,
slope.
19 Moderate: Severe: Moderate: Moderate: Good.
Colombo floods. floods. floods. floods.
20 Slight Moderate: Slight Slight Good.
Colombo slope,
seepage.
See footnote at end of table.
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16 SOIL SURVEY
management is needed if livestock and wildlife share the ments of livestock. It can be seeded into a clean, firm
range. Livestock watering facilities also are utilized by sorghum stubble, or it can be drilled into a firm prepared
various wildlife species. seedbed. Plowing and drilling should be on the contour to
This soil has good potential for urban and recreational minimize runoff and soil losses. Seeding early in spring
developments. Road design can be modified to compen- has proven most successsful. Capability subclass IVe
sate for the limited capacity of this soil to support a load. nonirrigated; Colby soil in Loamy Slopes range site,
Capability subclass IVe irrigated, VIe nonirrigated; Adena soil in Loamy Plains range site.
Loamy Slopes range site. 19—Colombo clay loam, 0 to 1 percent slopes. This is
18—Colby-Adena loarns, 3 to 9 percent slopes. These a deep, well drained soil on flood plains and terraces at
gently sloping to moderately sloping soils are on plains, elevations of 4,600 to 4,780 feet. It formed in stratified
hills, and ridges at elevations of 4,750 to 4,900 feet. The calcareous alluvium. Included in mapping are small areas
Colby soil, which makes up about 55 percent of the map of soils that have a loam surface layer and some small
unit, occupies the steeper, convex parts of the landscape. leveled areas.
The Adena soil, about 30 percent of the unit, occupies the Typically the surface layer of this Colombo soil is dark
less steep, slightly concave parts. About 15 percent is grayish brown clay loam about 14 inches thick. The upper
Kim loam and Weld loam. 7 inches of the underlying material is pale brown
The Colby soil is deep and well drained. It formed in stratified clay loam and loam. The lower part to a depth
calcareous eolian deposits. Typically the surface layer is of 60 inches is very pale brown loam stratified with thin
pale brown loam about 7 inches thick. The underlying lenses of fine sand, medium sand, and clay loam.
material to a depth of 60 inches is very pale brown silt Permeability is moderate. Available water capacity is
loam. high. The effective rooting depth is 60 inches or more.
Permeability is moderate. Available water capacity is Surface runoff is slow, and the erosion hazard is low.
high. The effective rooting depth is 60 inches or more. In irrigated areas this soil is suited to crops commonly
Surface runoff is rapid, and the erosion hazard is high. grown in the area, such as corn, sugar beets, beans, alfal-
The Adena soil also is deep and well drained and fa, onions, and potatoes.
formed in calcareous eolian deposits. Typically the surface All methods of irrigation that are common to the area
layer is brown loam about 6 inches thick. The subsoil is are used. Borders are suitable for small grain, alfalfa, and
brown and very pale brown clay loam about 3 inches pasture. Furrow irrigation is used for row crops. Crops
thick. The substratum to a depth of 60 inches is very pale respond to application of nitrogen and phosphorus.
brown silt loam. Windbreaks and environmental plantings of trees and
Permeability is slow. Available water capacity is high. shrubs commonly grown in the area are generally well
The effective rooting depth is 60 inches or more. Surface suited to this soil. Cultivation to control competing
runoff is medium, and the erosion hazard is moderate. vegetation should be continued for as many years as
This unit is used for nonirrigated cropland and range- possible following planting. Trees that are best suited and
land. It is suited to winter wheat, barley, and sorghum. have good survival are Rocky Mountain juniper, eastern
Most of the acreage is planted to winter wheat and is redcedar, ponderosa pine, Siberian elm, Russian-olive, and
summer fallowed in alternate years to allow moisture ac- hackberry. The shrubs best suited are skunkbush sumac,
cumulation. Generally precipitation is too low for benefi- lilac, Siberian peashrub, and American plum.
cial use of fertilizer. Wildlife is an important secondary use of this soil.
Stubble mulch farming, striperopping, and minimum til- Ring-necked pheasant, mourning dove, and many non-
lage are needed to control soil blowing and water erosion. game species can be attracted by establishing areas for
Terracing also may be needed to control water erosion. nesting and escape cover. For pheasants, undisturbed
The potential native vegetation on this unit is nesting cover is essential and should be included in plans
dominated by blue grama. Sideoats grama, little bluestem, for habitat development, especially in areas of intensive
and western wheatgrass are also prominent. Potential agriculture.
production ranges from 1,800 pounds per acre in favora- Where this soil is on flood plains and is susceptible to
ble years to 1,100 pounds in unfavorable years. As range flooding it has poor potential for urban and recreational
condition deteriorates, the sideoats grama and little development. On the higher terraces the potential is fair.
bluestem decrease, forage production drops, and blue Dwelling and road designs need to be modified to in-
grama, buffalograss, and several perennial forbs and crease the capacity of the soil to support a load and to
shrubs increase. Undesirable weeds and annuals invade protect it against frost action. Capability subclass IIw ir-
the site as range condition becomes poorer. rigated.
Management should be based on taking half and leaving 20—Colombo clay loam, 1. to 3 percent slopes. This is
half of the total annual production. Seeding is desirable if a deep, well drained soil on flood plains and terraces at
the range is in poor condition. Sideoats grama, little elevations of 4,600 and 4,780 feet. It formed in stratified
bluestem, western wheatgrass, bluegrama, pubescent calcareous alluvium. Included in mapping are small areas
wheatgrass, and crested wheatgrass are suitable for seed- of soils that have a loam surface layer. Some small
ing. The grass selected should meet the seasonal require- leveled areas are also included.
950444
I
WELD COUNTY, COLORADO, SOUTHERN PART 17
Typically the surface layer of this Colombo soil is dark Wildlife is an important secondary use of this soil. The
grayish brown clay loam about 14 inches thick. The upper cropland areas provide favorable habitat for ring-necked
7 inches of the underlying material is pale brown pheasant and mourning dove. Many nongame species can
stratified clay loam and loam. The lower part to a depth be attracted by establishing areas for nesting and escape
of 60 inches is very pale brown loam stratified with thin cover. For pheasants, undisturbed nesting cover is essen-
lenses of fine sand, medium sand, and clay loam. tial and should be included in plans for habitat develop-
Permeability is moderate. Available water capacity is ment, especially in areas of intensive agriculture. Range-
high. The effective rooting depth is 60 inches or more. land wildlife, for example, the pronghorn antelope, can be
Surface runoff is medium, and the erosion hazard is low. attracted by developing livestock watering facilities,
In irrigated areas this soil is suited to all crops com- managing livestock grazing, and reseeding where needed.
Where this soil is on flood plains and is susceptible to
monly grown in the area, including corn, sugar beets,
beans, alfalfa, small grain, potatoes, and onions. An exam-
ple of a suitable cropping system is 3 to 4 years of alfalfa development. On the higher terraces, potential is fair.
followed by corn, corn for silage, sugar beets, small grain, Dwelling and road designs may need to be modified to
compensate for the limited capacity of this soil to support
or beans. Land leveling, ditch lining, and installing
a load and to protect it against frost action. Capability
pipelines may be needed for proper water application.
All methods of irrigation are suitable, but furrow ir- subclass lie irrigated, IIIe nonirrigated; Clayey Plains
range site.
rigation is the most common. Barnyard manure and com- 21—Dacono clay loam, 0 to 1 percent slopes. This is a
mercial fertilizer are needed for top yields. deep, well drained soil on terraces at elevations of 4,550
In nonirrigated areas this soil is well suited to winter to 4,970 feet. It formed in mixed alluvium. Included in
wheat, barley, and sorghum if it is summer followed in al- mapping are small, long and narrow areas of sand and
ternate years. Winter wheat is the principal crop. The gravel deposits and some small leveled areas.
predicted average yield is 33 bushels per acre. If the crop Typically the surface layer of this Dacono soil is gray-
is winterkilled, spring wheat can be seeded. Generally ish brown clay loam about 12 inches thick. The subsoil is
precipitation is too low for beneficial use of fertilizer. grayish brown clay loam about 15 inches thick. The sub-
Stubble mulch farming, striperopping, and minimum til- stratum is very gravelly sand.
lage are needed to control soil blowing and water erosion. Permeability is moderately slow. Available water
Terracing also may be needed to control water erosion. capacity is moderate. The effective rooting depth is 20 to
The potential native vegetation is dominated by 40 inches. Surface runoff is slow, and the erosion hazard
western wheatgrass. Blue grama, switchgrass, sand is low.
reedgrass, big bluestem, slender wheatgrass, indiangrass, This soil is used almost entirely for irrigated crops. It
and green needlegrass are also present. Potential produc- is suited to all crops commonly grown in the area, includ-
tion ranges from 1,000 pounds per acre in favorable years ing corn, sugar beets, beans, alfalfa, small grain, potatoes,
to 600 pounds in unfavorable years. As range condition and onions. An example of a suitable cropping system is 3
deteriorates, the tall grasses decrease, blue grama and to 4 years of alfalfa followed by corn, corn for silage,
buffalograss increase, and forage production drops. Un- sugar beets, small grain, or beans. Generally, such charac-
desirable weeds and annuals invade the site and erosion teristics as a high clay content or a rapidly permeable
can occur as range condition becomes poorer. substratum slightly restrict some crops.
Management of vegetation on this soil should be based All methods of irrigation are suitable, but furrow ir-
rigation is the most common. Proper irrigation water
on taking half and leaving half of the total annual produc-
tion. Seeding is desirable if the range is in poor condition.
cial fertilizer are needed for top yields.
management is essential. Barnyard manure and commer-
Western wheatgrass, switchgrass, sand reedgrass,
Windbreaks and environmental plantings of trees and
sideoats grama, pubescent wheatgrass, intermediate
wheatgrass, and blue grama are suitable for seeding. The shrubs commonly grown in the area are generally well
grass selected should meet the seasonal requirements of suited to this soil. Cultivation to control competing
vegetation should be continued for as many years as
livestock. It can be seeded into a firm prepared seedbed. possible following planting. Trees that are best suited and
A grass drill should be used. Seeding early in spring has have good survival are Rocky Mountain juniper, eastern
proven most successful. redcedar, ponderosa pine, Siberian elm, Russian-olive, and
Windbreaks and environmental plantings of trees and hackberry. The shrubs best suited are skunkbush sumac,
shrubs commonly grown in the area are generally well lilac, Siberian peashrub, and American plum.
suited to this soil. Cultivation to control competing Openland wildlife, such as pheasant, mourning dove,
vegetation should be continued for as many years as and cottontail are best suited to this soil. Wildlife habitat
possible following planting. Trees that are best suited and development, including tree and shrub plantings and
have good survival are Rocky Mountain juniper, eastern grass plantings to serve as nesting areas, should be suc-
redcedar, ponderosa pine, Siberian elm, Russian-olive, and cessful without irrigation during most years. Under ir-
hackberry. The shrubs best suited are skunkbush sumac, rigation, good wildlife habitat can be established, benefit-
lilac, Siberian peashrub, and American plum. ing, many kinds of openland wildlife.
950444
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