HomeMy WebLinkAbout950677.tiff 28 SOIL SURVEY
40—Nunn loam, 1 to 3 percent slopes. This is a deep, vegetation should be continued for as many years as
well drained soil on terraces at elevations of 4,550 to 5,000 possible following planting. Trees that are best suited and
feet. It formed in mixed alluvium. Included in mapping have good survival are Rocky Mountain juniper, eastern
are small, long and narrow areas of sand and gravel redcedar, ponderosa pine, Siberian elm, Russian-olive, and
deposits and small areas of soils that are subject to occa- hackberry. The shrubs best suited are skunkbush sumac,
sional flooding. Some leveled areas are also included. lilac, Siberian peashrub, and American plum.
Typically the surface layer of this Nunn soil is grayish Wildlife is an important secondary use of this soil. The
brown loam about 12 inches thick. The subsoil is light cropland areas provide favorable habitat for ring-necked
brownish gray clay loam about 12 inches thick. The upper pheasant and mourning dove. Many nongame species can
part of the substratum is light brownish gray clay loam. be attracted by establishing areas for nesting and escape
The lower part to a depth of 60 inches is brown sandy cover. For pheasants, undisturbed nesting cover is essen-
loam. tial and should be included in plans for habitat develop-
Permeability is moderately slow. Available water ment, especially in areas of intensive agriculture. Range-
capacity is high. The effective rooting depth is 60 inches land wildlife, for example, the pronghorn antelope, can be
or more. Surface runoff is medium, and the erosion attracted by developing livestock watering facilities,
hazard is low. managing livestock grazing, and reseeding where needed.
In irrigated areas this soil is suited to all crops com- This soil has fair to poor potential for urban develop-
monly grown in the area, including corn, sugar beets, ment. It has moderate to high shrink swell, low strength,
beans, alfalfa, small grain, potatoes, and onions. An exam- and moderately slow permeability. These features create
ple of a suitable cropping system is 3 to 4 years of alfalfa problems in dwelling and road construction. Those areas
followed by corn, con for silage, sugar beets, small grain, that have loam or sandy loam in the lower part of the
or beans. Generally such characteristics as a high clay substratum are suitable for septic tank absorption fields
content or a rapidly permeable substratum slightly and foundations. Some areas of this soil are adjacent to
restrict some crops. streams and are subject to occasional flooding. The poten-
All methods of irrigation are suitable, but furrow ir- tial is fair for such recreational development as camp and
rigation is the most common. Proper irrigation water picnic areas and playgrounds. Capability subclass Ile ir-
management is essential. Barnyard manure and commer- rigated, IIIc nonirrigated; Loamy Plains range site.
cial fertilizer are needed for top yields. 41—Nunn clay loam, 0 to 1 percent slopes. This is a
Most nonirrigated areas are used for small grain. The deep, well drained soil on terraces and smooth plains at
soil is summer followed in alternate years. Winter wheat elevations of 4,550 to 5,150 feet. It formed in mixed allu-
is the principal crop. If the crop is winterkilled, spring vium and eolian deposits. Included in mapping are small,
wheat can be seeded. Generally precipitation is too low long and narrow areas of sand and gravel deposits and
for beneficial use of fertilizer. small areas of soils that are subject to occasional flooding.
Such practices as stubble mulch farming, striperopping, Some small leveled areas are also included.
and minimum tillage are needed to control soil blowing Typically the surface layer of this Nunn soil is grayish
and water erosion. brown clay loam about 9 inches thick. The subsoil is light
The potential native vegetation is dominated by blue brownish gray clay loam about 14 inches thick. The upper
grama. Several mid grasses, such as western wheatgrass part of the substratum is clay loam. The lower part to a
and needleandthread, are also present. Potential produc- depth of 60 inches is sandy loam.
tion ranges from 1,600 pounds per acre in favorable years Permeability is moderately slow. Available water
to 1,000 pounds in unfavorable years. As range condition capacity is high. The effective rooting depth is 60 inches
deteriorates, the mid grasses decrease; blue grama, buf- or more. Surface runoff is slow, and the erosion hazard is
falograss, snakeweed, yucca, and fringed sage increase; low.
and forage production drops. Undesirable weeds and an- This soil is used almost entirely for irrigated crops. It
nuals invade the site as range condition becomes poorer. is suited to all crops commonly grown in the area, includ-
Management of vegetation on this soil should be based ing corn, sugar beets, beans, alfalfa, small grain, potatoes,
on taking half and leaving half of the total annual produc- and onions. An example of a suitable cropping system is 3
tion. Seeding is desirable if the range is in poor condition. to 4 years of alfalfa followed by corn, corn for silage,
Sideoats grama, little bluestem, western wheatgrass, blue sugar beets, small grain, or beans. Few conservation prac-
grama, pubescent wheatgrass, and crested wheatgrass are tices are needed to maintain top yields.
suitable for seeding. The grass selected should meet the All methods of irrigation are suitable, but furrow ir-
seasonal requirements of livestock. It can be seeded into rigation is the most common. Barnyard manure and com-
a clean, firm sorghum stubble, or it can be drilled into a mercial fertilizer are needed for top yields.
firm prepared seedbed. Seeding early in spring has Windbreaks and environmental plantings of trees and
proven most successful. shrubs commonly grown in the area are generally well
Windbreaks and environmental plantings of trees and suited to this soil. Cultivation to control competing
shrubs commonly grown.in the area are generally well vegetation should be continued for as many years as
suited to this soil. Cultivation to control competing possible following planting. Trees that are best suited and
950677
32 SOIL SURVEY
are Rocky Mountain juniper, eastern redcedar, ponderosa ble years to 1,800 pounds in unfavorable years. As range
pine, Siberian elm, Russian-olive, and hackberry. The condition deteriorates, the sand bluestem, sand reedgrass,
shrubs best suited are skunkbush sumac, lilac, and Siberi- and switchgrass decrease and blue grama, sand dropseed,
an peashrub. and sand sage increase. Annual weeds and grasses invade
Wildlife is an important secondary use of this soil. The the site as range condition becomes poorer.
cropland areas provide favorable habitat for ring-necked Management of vegetation on this soil should be based
pheasant and mourning dove. Many nongame species can on taking half and leaving half of the total annual produc-
be attracted by establishing areas for nesting and escape tion. Seeding is desirable if the range is in poor condition.
cover. For pheasants, undisturbed nesting cover is essen- Sand bluestem, sand reedgrass, switchgrass, sideoats
tial and should be included in plans for habitat develop- grama, blue grama, and pubescent wheatgrass are suita-
ment, especially in areas of intensive agriculture. ble for seeding. The grass selected should meet the
Rapid expansion of Greeley and the surrounding area seasonal requirements of livestock. It can be seeded into
has resulted in urbanization of much of this Olney soil. a clean, firm sorghum stubble, or it can be drilled into a
This soil has good potential for urban and recreational firm prepared seedbed. Seeding early in spring has
development. The only limiting feature is the moderately proven most successful.
rapid permeability in the substratum, which causes a Windbreaks and environmental plantings are generally
hazard of ground water contamination from sewage suited to this soil. Soil blowing, the principal hazard in
lagoons. Lawns, shrubs, and trees grow well. Capability establishing trees and shrubs, can be controlled by cul-
class I irrigated. tivating only in the tree row and by leaving a strip of
47—Olney fine sandy loam, 1 to 3 percent slopes. vegetation between the rows. Supplemental irrigation
This is a deep, well drained soil on plains at elevations of may be needed at the time of planting and during dry
4,600 to 5,200 feet. It formed in mixed outwash deposits. periods. Trees that are best suited and have good survival
Included in mapping are small areas of soils that have a are Rocky Mountain juniper, eastern redcedar, ponderosa
dark surface layer. Some small leveled areas are also in- pine, Siberian elm, Russian-olive, and hackberry. The
eluded. shrubs best suited are skunkbush sumac, lilac, and Siberi-
Typically the surface layer of this Olney soil is grayish an peashrub.
brown fine sandy loam about 10 inches thick. The subsoil Wildlife is an important secondary use of this soil. The
is yellowish brown and very pale brown sandy clay loam cropland areas provide favorable habitat for ring-necked
about 14 inches thick. The substratum to a depth of 60 pheasant and mourning dove. Many nongame species can
inches is very pale brown, calcareous fine sandy loam. be attracted by establishing areas for nesting and escape
Permeability and available water capacity are cover. For pheasants, undisturbed nesting cover is essen-
moderate. The effective rooting depth is 60 inches or tial and should be included in plans for habitat develop-
more. Surface runoff is medium, and the erosion hazard is ment, especially in areas of intensive agriculture. Range-
low land wildlife, for example, the pronghorn antelope, can be
In irrigated areas this soil is suited to all crops com- attracted by developing livestock watering facilities,
monly grown in the area, including corn, sugar beets, managing livestock grazing, and reseeding where needed.
beans, alfalfa, small grain, potatoes, and onions. An exam- Rapid expansion of Greeley and the surrounding area
ple of a suitable cropping system is 3 to 4 years of alfalfa has resulted in urbanization of much of the Olney soil.
followed by corn, corn for silage, sugar beets, small grain, This soil has good potential for urban and recreational
or beans.- Land leveling, ditch lining, and installing development. The only limiting feature is the moderately
pipelines may be needed for proper water application. All rapid permeability in the substratum, which causes a
methods of irrigation are suitable, but furrow irrigation is hazard of ground water contamination from sewage
the most common. Barnyard manure and commercial fer- lagoons. Lawns, shrubs, and trees grow well. Capability
tilizer are needed for top yields. subclass Ile irrigated, IVe nonirrigated; Sandy Plains
In nonirrigated areas this soil is suited to winter wheat, range site.
barley, and' sorghum. Most of the acreage is planted to 48—Olney fine sandy loam, 3 to 5 percent slopes.
winter wheat. The predicted average yield is 28 bushels This is a deep, well drained soil on plains at elevations of
per acre. The soil is summer fallowed in alternate years 4,600 to 5,200 feet. It formed in mixed outwash deposits.
to allow moisture accumulation. Generally precipitation is Included in mapping are small areas of soils that have a
too low for beneficial use of fertilizer. dark surface layer and small areas of soils that have
Stubble mulch farming, striperopping, and minimum til- sandstone and shale within a depth of 60 inches.
lage are needed to control soil blowing and water erosion. Typically the surface layer of this Olney soil is grayish
Terracing also may be needed to control water erosion. brown fine sandy clay loam about 8 inches thick. The sub-
The potential native vegetation on this range site is soil is yellowish brown and very pale brown fine sandy
dominated by sand bluestem, sand reedgrass, and blue loam about 12 inches thick. The substratum to a depth of
grama. Needleandthread, switchgrass, sideoats grama, 60 inches is very pale brown, calcareous fine sandy loam.
and western wheatgrass are also prominent. Potential Permeability and available water capacity are
production ranges from 2,200 pounds per acre in favora- moderate. The effective rooting depth is 60 inches or
950677
WELD COUNTY, COLORADO, SOUTHERN PAST 33
more. Surface runoff is medium, and'the erosion hazard is ment, especially in areas of intensive agriculture. Range-
low. land wildlife, for example, the pronghorn antelope, can be
In irrigated areas this soil is suited to the crops com- attracted by developing livestock watering facilities,
monly grown in the area. Perennial grasses and alfalfa or managing livestock grazing, and reseeding where needed.
close grown crops should be grown at least 50 percent of Rapid expansion of Greeley and the surrounding area
the time. Contour ditches and corrugations can be used in has resulted in urbanization of much of this Olney soil.
irrigating close grown crops and pasture. Furrows, con- The soil has good potential for urban and recreational
tour furrows, and cross slope furrows are suitable for row development. The only limiting feature is the moderately
crops. Sprinkler irrigation is also desirable. Keeping til- rapid permeability in the substratum, which causes a
lage to a minimum and utilizing crop residue help to con- hazard of ground water contamination from sewage
trol erosion. Maintaining fertility is important. Crops lagoons. Lawps, shrubs, and trees grow well. Capability
respond to applications of phosphorus and nitrogen. subclass IIIe irrigated, IVe nonirrigated; Sandy Plains
In nonirrigated areas this soil is suited to winter wheat, range site.
barley, and sorghum. Most of the acreage is planted to 49—Osgood sand, 0 to 3 percent slopes. This is a deep,
winter wheat. The predicted average yield is 25 bushels well drained soil on smooth plains at elevations of 4,680 to
per acre. The soil is summer fallowed in alternate years 4,900 feet. It formed in eolian sands. Included in mapping
to allow moisture accumulation. Generally precipitation is are small areas of soils that have a subsoil within 20
too low for beneficial use of fertilizer. inches of the surface. Also included are small areas of
Stubble mulch farming, striperopping, and minimum til- soils that have a loam and sandy clay loam subsoil.
lage are needed to control soil blowing and water erosion. Typically the surface layer of this Osgood soil is gray-
Terracing also may be needed to control water erosion. ish brown sand about 22 inches thick. The subsoil is
The potential native vegetation on this range site is brown sandy loam about 12 inches thick. The substratum
dominated by sand bluestem, sand reedgrass, and blue to a depth of 60 inches is pale brown loamy sand and
grama. Needleandthread, switchgrass, sideoats grama, sand.
and western wheatgrass are also prominent. Potential Permeability is moderately rapid. Available water
production ranges from 2,200 pounds per acre in favora- capacity is moderate. The effective rooting depth is 60
ble years to 1,800 pounds in unfavorable years. As condi- inches or more. Surface runoff is very slow, and the ero-
i` tion deteriorates, sand bluestem, sand reedgrass, and sion hazard is low.
switchgrass decrease and blue grama, sand dropseed, and This soil is suited to limited cropping. Intensive
sand sage increase. Annual weeds and grasses invade the cropping is hazardous because of erosion. The cropping
site as range condition becomes poorer. system should be limited to such close grown crops as al-
i Management of vegetation on this soil should be based falfa, wheat, and barley. This soil also is suited to ir-
0 on taking half and leaving half of the total annual produc- rigated pasture. A suitable cropping system is 3 to 4
tion. Seeding is desirable if the range is in poor condition. years of alfalfa followed by 2 years of corn and small
Sand bluestem, sand reedgrass, switchgrass, sideoats grain and alfalfa seeded with a nurse crop.
grama, blue grama, pubescent wheatgrass, and crested Closely spaced contour ditches or sprinklers can be
wheatgrass are suitable for seeding. The grass selected used in irrigating close grown crops. Contour furrows or
should meet the seasonal requirements of livestock. It can sprinklers should be used for new crops. Applications of
be seeded into a clean, firm sorghum stubble, or it can be nitrogen and phosphorus help in maintaining good produc-
drilled into a firm prepared seedbed. Seeding early in tion.
spring has proven most successful. The potential vegetation on this soil is dominated by
Windbreaks and environmental plantings are generally sand bluestem, sand reedgrass, switchgrass, sideoats
'4 suited to this soil. Soil blowing, the principal hazard in grama, needleandthread, little bluestem, and blue grama.
establishing trees and shrubs, can be controlled by cul- Potential production ranges from 2,500 pounds per acre in
tivating only in the tree row and by leaving a strip of favorable years to 1,800 pounds in unfavorable years. As
vegetation between the rows. Supplemental irrigation range condition deteriorates, the sand bluestem,
4 may be needed at the time of planting and during dry switchgrass, sand reedgrass, sideoats grama, and little
periods. Trees that are best suited and have good survival bluestem decrease; forage production drops; and sand
iare Rocky Mountain juniper, eastern redcedar, ponderosa sage increases. Undesirable weeds and annuals invade
pine, Siberian elm, Russian-olive, and hackberry. The and "blowout" conditions can occur as range condition
shrubs best suited are skunkbush sumac, lilac, and Siberi- becomes poorer.
Management of vegetation on this soil should be based
an peashrub.
Wildlife .is an important secondary use of this soil. The on taking half and leaving half of the total annual produc-
cropland areas provide favorable habitat for ring-necked tion. Seeding is desirable if the range is in poor condition.
pheasant and mourning dove. Many nongame species can Sand bluestem, sand reedgrass, indiangrass, switchgrass,
be attracted by establishing areas for nesting and escape sideoats grama, little bluestem, and blue grama are suita-
cover. For pheasants, undisturbed nesting cover is essen- ble for seeding. Because this soil is susceptible to soil
tial and should be included in plans for habitat develop- blowing, the grasses should be seeded with an interseeder
1:06'7'7
WELD COUNTY, COLORADO, SOUTHERN - 3T 35
and switchgrass decrease and blue grama, sand dropseed, should be grown at least 50 percent of the time. Contour
and sand sage increase. Annual weeds and grasses invade ditches and corrugations can be used in irrigating close
the site as range condition becomes poorer. grown crops and pasture. Furrows, contour furrows, and
Management of vegetation on this soil should be based cross slope furrows are suitable for row crops. Sprinkler
on taking half and leaving half of the total annual produc- irrigation is also desirable. Keeping tillage to a minimum
tion. Seeding is desirable if the range is in poor condition. and utilizing crop residue help to control erosion. Main-
Sand bluestem, sand reedgrass, switchgrass, sideoats taming fertility is important. Crops respond to applica-
grama, blue grama, pubescent wheatgrass, and crested tions of phosphorus and nitrogen.
wheatgrass are suitable for seeding. The grass selected The potential native vegetation on this site is
should meet the seasonal requirements of livestock. It can dominated by sand bluestem, sand reedgrass, and blue
be seeded into a clean, firm stubble, or it can be drilled grama. Needleandthread, switchgrass, sideoats grama,
into a firm prepared seedbed. Seeding early in spring has and western `wheatgrass are also prominent. Potential
proven most successful. production ranges from 2,200 pounds per acre in favora-
Windbreaks and environmental plantings are generally ble years to 1,800 pounds in unfavorable years. As range
suited to this soil. Soil blowing, the principal hazard in condition deteriorates, the sand bluestem, sand reedgrass,
establishing trees and shrubs, can be controlled by cul- and switchgrass decrease, and blue grama, sand dropseed,
tivating only in the tree row and by leaving a strip of and sand sage increase. Annual weeds and grasses invade
vegetation between the rows. Supplemental irrigation the site as range condition becomes poorer.
may be needed at the time of planting and during dry Management of vegetation on this soil should be based
periods. Trees that are best suited and have good survival on taking half and leaving half of'the total annual produc-
are Rocky Mountain juniper, eastern redcedar, ponderosa tion. Seeding is desirable if the range is in poor condition.
pine, Siberian elm, Russian-olive, and hackberry. The Sand bluestem, sand reedgrass, switchgrass, sideoats
•
shrubs best suited are skunkbush sumac, lilac, and Siberi- grama, blue grama, pubescent wheatgrass, and crested
an peashrub. wheatgrass are suitable for seeding. The grass selected
Wildlife is an important secondary use of this soil. should meet the seasonal requirements of livestock. It can
Ring-necked pheasant, mourning dove, and many non- be seeded into a clean, firm sorghum stubble, or it can be
game species can be attracted by establishing areas for drilled into a firm prepared seedbed. Seeding early in
nesting and escape cover. For pheasants, undisturbed spring has proven most successful.
• nesting cover is essential and should be included in plans Windbreaks and environmental plantings are generally
for habitat development, especially in areas of intensive suited to this soil. Soil blowing, the principal hazard in
agriculture. establishing trees and shrubs, can be controlled by cul-
t Rapid expansion of Greeley and the surrounding area tivating only in the tree row and by leaving a strip of
has resulted in urbanization of much of this Otero soil. vegetation between the rows. Supplemental irrigation
} This soil has excellent potential for urban and recrea- may be needed at the time of planting and during dry
tional development. The only limiting feature is the periods. Trees that are best suited and have good survival
moderately rapid permeability in the substratum, which are Rocky Mountain juniper, eastern redcedar, ponderosa
causes a hazard of ground water contamination from pine, Siberian elm, Russian-olive, and hackberry. The
sewage lagoons. Lawns, shrubs, and trees grow well. shrubs best suited are skunkbush sumac, lilac, and Siberi-
7 Capability subclass IIIe irrigated, IVe nonirrigated; an peashrub.
Sandy Plains range site. Wildlife is an important secondary use of this soil.
52—Otero sandy loam, 3 to 5 percent slopes. This is a Ring-necked pheasant, mourning dove, and many non-
deep, well drained soil on plains at elevations of 4,700 to game species can be attracted by establishing areas for
5,250 feet. It formed in mixed outwash and eolian nesting and escape cover. For pheasants, undisturbed
deposits. Included in mapping are small areas of soils that nesting cover is essential and should be included in plans
have loam and clay loam underlying material. Also in- for habitat development, especially in areas of intensive
eluded are small areas of soils that have sandstone and agriculture.
shale within a depth of 60 inches. Rapid expansion of Greeley and the surrounding area
Typically the surface layer of this Otero soil is brown has resulted in urbanization of much of this Otero soil.
sandy loam about 10 inches thick. The underlying material The soil has excellent potential for urban and recreational
to a depth of 60 inches is pale brown calcareous fine development. The only limiting feature is the moderately
sandy loam. rapid permeability in the substratum, which causes a
Permeability is rapid. Available water capacity is hazard of ground water contamination from sewage
moderate. The effective rooting depth is 60 inches or lagoons. Lawns, shrubs, and trees grow well. Capability
more. Surface runoff is medium, and the erosion hazard is subclass IIIe irrigated, VIe nonirrigated; Sandy Plains
low range site.
This soil is used almost entirely for irrigated crops. It 53—Otero sandy loam, 5 to 9 percent slopes. This is a
is suited to the crops commonly grown in the area. deep, well drained soil on plains at elevations of 4,700 to
Perennial grasses and alfalfa or close growing crops 5,250 feet. It formed in mixed outwash and eolian
9506.17
•
32
•
3.... X47
•
• a
40 47 33
j 4Z. 48
47 40C.. 40
48 •
• 4r. 33 ,3 3932
� -4 „
, , : 32
52 •l ��
Xi
Puritan.: ,r x.•p • �,
33 40 40
•
39
4.
p0 (, R filirr.3;
48
a ;' 2 40h ,
wuw l
Y 33
f
`'' 52
32
t .
x. .a ." 40 ai
„„ 2. 66
48 tl'
-
3$
40 67
K 57
w
X . 40
1 . 67 ,
mss
a `F x .40 67 :.
57
67 • 6 p/�y
c
i
n
11' 5,L • 3!' '?-R.I•t'.':''''.••;W•7'4 ..• •'•'..2 ...•::•' '. \?•-•:.57. .10" 67. 40 ..�. ._
I .
sIFIN‘w;
.' x• .. 4rr N
'� 3
i. •
M f r
67
40
66
40 66
.444tt,'' '.' a ,p ,A.,., . 66
c , wa
O
�a 7 Jr' w : u,
_ 67 5
ff�•.?.:-L: , : is #'. : ; 80 �� s
Hello