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Image scanned from Map Sheet No. 29 of the USDA Soil Conservation Service Soil
Survey of Weld County, Southern Part.
Soil types present on subject property:
33—Kim Loam, 3 to 5% slopes
47—Olney Fine Sandy Loam, 0 to 1% slopes
48—Olney Fine Sandy Loan, 1 to 3% slopes
76—Vona Sandy Loam, 1 to 3% slopes
77—Vona Sandy Loam, 3 to 5% slopes
Soil descriptions attached.
Exhibit
2005-2026 I
WELD COUNTY, COLORADO, SOUTHERN PART 23
.. and environmental plantings of trees and The potential native vegetation is dominated by blue
• z grown in the area are generally well grams. Several mid grasses, such as western wheatgrass
this soil. Cultivation to control competing and needleandthread, are also present. Potential produc-
should be continued for as many years as tion ranges from 1,600 pounds per acre in favorable years
planting.Trees that are best suited and to 1,000 pounds in unfavorable years. As range condition
survival are Rocky Mountain juniper, eastern deteriorates, the mid grasses decrease; bhze grams, buf-
ponderosa pine, Siberian elm, Russian-olive,and falograss, snakeweed, yucca, and fringed sage increase;
. .The shrubs best suited are skunkbush sumac, and forage production drops. Undesirable weeds and an-
peaahrub, lilac,and American plum. nuals invade the site as range condition becomes poorer.
is an important secondary use of this Boil The Management of vegetation on this soil should be based
areas provide favorable habitat for ring-necked on taking half and leaving half of the total annual produc-
ed mourning dove. Many nongame species can tion. Seeding is desirable if the range is in poor condition.
by establishing areas for nesting and escape Sideoats grama, little bluestem, western wheatgrass, blue
• pheasants, undisturbed nesting cover is Pa.n- gas, pubescent wheatgrass, and crested wheatgrass are
should be included in plans for habitat develop- suitable for seeding. The grass selected should meet the
. it in areas of intensive agriculture_ seasonal requirements of livestock. It can be seeded into
slat has good potential for urban and recreational a clean, firm sorghum stubble, or it can be drilled into a
Increased population growth in the survey firm prepared seedbed. Seeding early in spring has
resulted in increased homesite construction. The proven most successful.
- 7 feature for urban development and road Windbreaks and environmental plantings of trees and
is the limited capacity of the soil to support shrubs commonly grown in the area are generally well
anted to this soil. Cultivation to control competing
tank absorption fields function properly,but
• sewage systems should be provided if the vegetation should be continued for as many years as
density increases. Because of the permeability possible following planting. Trees that are best suited and
=beetle, sewage lagoons must be sealed, have good survival are Rocky Mountain juniper, eastern
abawLe,and trees grow well. Capability class I ir- redcedar, ponderosa pine, Siberian elm, Russian-olive, and
hackberry. The shrubs beat suited are skunkbush sumac,
loam, 1 to 3 percent slopes. This is a deep •Siberian peashrub and American plum.
soil on smooth plains and alluvial fans at Wildlife is an important secondary use of this soil. The
III d 4,900 to 5,250 feet. It formed in mixed Me areas provide favorable habitat for ring-necked
ad parent sediment from a wide variety of pheasant and mourning dove. Many nongame species can
Included in mapping are small areas of soils that be attracted by establishing areas for nesting and escape
and underlying material. cover. For pheasants, undisturbed nesting cover is essen-
• the surface layer is brown and pale brown tial and should be included in plans for habitat develop-
12 inches thick. The upper 28 inches of the un men especially in areas of intensive agriculture. Range
-
12 is pale brown loam. The lower part to a hind wildlife, for example, the pronghorn antelope, can be
m aeialis pale n. loam. attracted by developing livestock watering facilities,
inches brown sandy e wytlo is managing livestock grazing,and reseeding where needed.
effective moderate.rooting depth is 60 Aterincr capacitys or more. This soil has good potential for urban and recreational
• runoff is and the is hazard is low. development. Increased population growth in the survey
areas medium,e this soil the
tuitedo all rs Min- area has resulted in increased homesite construction. The
•�n in the area, corn, beets, chief limiting soil feature for urban development and road
small grain, includingtatoes, and onions sugarAn beets,
construction is the limited capacity of this soil to support
• m system a load.Septic tank absorption fields function properly,but
actable crop
ping g is 3 to 4 years of alfalfa community sewage systems should be provided if the
by earn, corn for silage,sugar beets,small grain, population density increases. Because of the permeability
Land leveling, ditch lining (fig. 6), and installing of the substratum, sewage lagoons must be sealed.
may be needed for proper water applications. Lawns, shrubs, and trees grow well. Capability subclass
• . . of irrigation are suitable, but furrow ir- IIe irrigated, IVe nonirrigated; Loamy Plains range site.
is the most common. Barnyard manure and com- 33—Kim loam, 3 to 5 percent slopes. This is a deep,
lsed6aer are needed for top yields. well drained soil on plains and alluvial fans at elevations
" . :, areas this soil is suited to winter wheat, of 4,900 to 5,250 feet. It formed in mixed eolian deposits
ad sorghum. Most of the acreage is planted to and parent sediment from a wide variety of bedrock. In-
wind and is summer (allowed in alternate years eluded in mapping are small areas of soils that have
soistnre accumulation. Generally precipitation is loamy sand underlying material.
fr beneficial use of fertilizer. Typically the surface layer is brown and pale brown
ankh farming, striperopping, and minimum til- loam about 10 inches thick. The upper 28 inches of the un-
needed to control soil blowing and water erosion. denying material is pale brown loam. The lower part to a
also may be needed to control water erosion. depth of 60 inches is pale brown fine sandy loam.
•
•
24 SOIL SURVEY
Permeability is moderate. Available water capacity is land wildlife, for example, the pronghorn antelope, can be
high. The effective rooting depth is 60 inches or more. attracted by developing livestock watering facilities,
Surface runoff is medium, and the erosion hazard is managing livestock grazing, and reseeding where needed.
moderate. This soil has good potential for urban and recreational
In irrigated areas this soil is suited to crops commonly development. Increased population growth in the survey
grown in the area Perennial grasses and alfalfa or close area has resulted in increased homesite construction. The
grown crops should be grown at least 50 percent of the chief limiting soil feature for urban development and road
time. Contour ditches and corrugations can be used in ir- construction is the limited capacity of this soil to support
rigating close grown crops and pasture. Furrows, contour a load. Septic tank absorption fields function properly, but
furrows, and cross slope furrows are suitable for row community sewage systems should be provided if the
crops. Sprinkler irrigation is also suggested. Keeping til- population density increases. Because of the permeability
lage to a minimum and utilizing crop residue help to con- of the substratum, sewage lagoons must be sealed.
trol erosion. Maintaining fertility is important. Crops Lawns, shrubs, and trees grow well. Capability subclass
respond to applications of phosphorus and nitrogen. IIIe irrigated, IVe nonirrigated; Loamy Plains range site.
In nonirrigated areas this soil is suited to winter wheat,
barley, and sorghum. Most of the acreage is planted to 34—Kim loam, 5 to 9 percent slopes. This is a deep,
winter wheat. The predicted average yield is 28 bushels well drained soil on plains and alluvial fans at elevations
per acre. The soil is summer fallowed in alternate years of 4,900 to 5,250 feet. It formed in mixed eolian deposits
to allow moisture accumulation. Generally precipitation is and parent sediment from a wide variety of bedrock. In-
too low for beneficial use of fertilizer. eluded in mapping are small areas of soils that have
Stubble mulch farming, striperopping, and minimum til- loamy sand underlying material.
lage are needed to control soil blowing and water erosion. Typically the surface layer is brown and pale brown
Terracing also may be needed to control water erosion. loam about 10 inches thick The upper 25 inches of the un-
The potential native vegetation is dominated by blue derlying material is pale brown loam. The lower part to a
grama. Several mid grasses, such as western wheatgrass depth of 60 inches is pale brown fine sandy loam.
and needleandthread, are also present. Potential produc- Permeability is moderate. Available water capacity is
tion ranges from 1,600 pounds per acre in favorable years high. The effective rooting depth is 60 inches or more.
to 1,000 pounds in unfavorable years. As range condition Surface runoff is rapid, and the erosion hazard is
deteriorates, the mid grasses decrease; blue grams, buf- moderate.
falograss, snakeweed, yucca, and fringed sage increase; This soil is suited to limited cropping. Intensive
and forage production drops. Undesirable weeds and an- cropping is hazardous because of erosion. The cropping
nuals invade the site as range condition becomes poorer. system should be limited to such close grown crops as al-
Management of vegetation on this soil should be based falfa, wheat, and barley. This soil also is suited to ir-
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
Sideoats grams, little bluestem, western wheatgrass, blue grain and alfalfa seeded with a nurse crop.
grams, pubescent wheatgrass, and crested wheatgrass are Close grown crops can be irrigated from closely spaced
suitable for seeding. The grass selected should meet the contour ditches or sprinklers. Contour furrows or sprin-
seasonal requirements of livestock It can be seeded into klers should be used for new crops. Applications .,
a clean, firm sorghum stubble, or it can be drilled into a nitrogen and phosphorus help in maintaining good product-
firm prepared seedbed. Seeding early in spring has tion.
proven most successful The potential native vegetation is dominated by blue
Windbreaks and environmental plantings of trees and grama. Sideoats grams, little bluestem, western wheat-
shrubs commonly grown in the area are generally well grass, and sedge are also prominent. Potential production
suited to this soil. Cultivation to control competing ranges from 1,800 pounds per acre in favorable years to
vegetation should be continued for as many years as 1,500 pounds in unfavorable years. As range condition
possible following planting. Trees that are best suited and deteriorates, the sideoats grama and little blueste•
have good survival are Rocky Mountain juniper, eastern decrease; forage production drops; and blue grams, buf
redcedar, ponderosa pine, Siberian elm, Russian-olive, and falograss, and several perennial (orbs and shrubs
•
hackberry. The shrubs best suited are skunkbush sumac, crease. Undesirable weeds and annuals invade the site
lilac, Siberian peashrub, and American plum. range condition becomes poorer.
Wildlife is an important secondary use of this soil. The Management of vegetation should be based on
cropland areas provide favorable habitat for ring-necked half and leaving half of the total annual production. ' -.
pheasant and mourning dove. Many nongaine species can ing is desirable if the range is in poor condition. Sideoa.
be attracted by establishing areas for nesting and escape grams, little bluestem, western wheatgrass, and p
cover. For pheasants, undisturbed nesting cover is essen- bescent wheatgrass are suitable for seeding. The .:
tial and should be included in plans for habitat develop- selected should meet the seasonal needs of livestock. I.
ment, especially in areas of intensive agriculture. Range- can be seeded into a clean, firm sorghum stubble, or .
•
32 SOIL SURVEY
ire Rocky Mountain juniper, eastern redcedar, ponderosa ble years to 1,800 pounds in unfavorable years. As ran
tine, Siberian elm, Russian-olive, and hackberry. The condition deteriorates,the sand bluestem, sand reed
shrubs best suited are skunkbush sumac, lilac, and Siberi- and switchgrass decrease and blue grams, sand drop
Ir'^aahrub. and sand sage increase. Annual weeds and grasses invad
.dlife is an important secondary use of this soil. The the site as range condition becomes poorer.
ropland areas provide favorable habitat for ring-necked Management of vegetation on this soil should be b
pheasant and mourning dove. Many nongame species can on taking half and leaving half of the total annual produ
m attracted by establishing areas for nesting and escape tion. Seeding is desirable if the range is in poor conditio
:over. For pheasants, undisturbed nesting cover is essen- Sand bluestem, sand reedgrass, switchgrass, sideoa
:ial and should be included in plans for habitat develop- grams, blue grama, and pubescent wheatgrass are sui
-pent, especially in areas of intensive agriculture. ble for seeding. The grass selected should meet th
Rapid expansion of Greeley and the surrounding area seasonal requirements of livestock. It can be seeded in
pas resulted in urbanization of much of this Olney soil. a clean, firm sorghum stubble, or it can be drilled into
This soil has good potential for urban and recreational firm prepared seedbed. Seeding early in spring h
development. The only limiting feature is the moderately proven most successful.
rapid permeability in the substratum, which causes a Windbreaks and environmental plantings are gene
hazard of ground water contamination from sewage suited to this soil. Soil blowing, the principal hazard
•
lagoons. Lawns, shrubs, and trees grow well. Capability establishing trees and shrubs, can be controlled by c
class I irrigated. tivating only in the tree row and by leaving a strip
47—Olney fine sandy loam, 1 to 3 percent slopes. vegetation between the rows. Supplemental irrigati
This is a deep, well drained soil on plains at elevations of may be needed at the time of planting and during d
4,600 to 5,200 feet. It formed in mixed outwash deposits. periods. Trees that are best suited and have good surviv
Included in mapping are small areas of soils that have a are Rocky Mountain juniper, eastern redcedar, ponde
dark surface layer. Some small leveled areas are also in- pine, Siberian elm, Russian-olive, and hackberry.
eluded. shrubs best suited are skunkbush sumac, lilac, and Sibe
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.
is yellowish brown and very pale brown sandy clay loam cropland areas provide favorable habitat for ring-neck
about 14 inches thick. The substratum to a depth of 60 pheasant and mourning dove. Many nongame species
inches is very pale brown,calcareous fine sandy loam. be attracted by establishing areas for nesting and escca
Egrmeability and available water capacity are cover. For pheasants, undisturbed nesting cover is ease
n rate. The effective rooting depth is 60 inches or tial and should be included in plans for habitat develo
mo.e. Surface runoff is medium,and the erosion hazard is ment, especially in areas of intensive agriculture. Ran
low. land wildlife, for example, the pronghorn antelope, can
In irrigated areas this soil is suited to all crops corn- attracted by developing livestock watering faciliti
monly grown in the area, including corn, sugar beets, managing livestock grazing, and reseeding where need
beans, alfalfa, small grain, potatoes, and onions. An exam- Rapid expansion of Greeley and the surrounding
ple of a suitable cropping system is 3 to 4 years of alfalfa has resulted in urbanization of much of the Olney so
followed by corn, corn for silage, sugar beets, small grain, This soil has good potential for urban and recreatio
or beans. Land leveling, ditch lining, and installing development. The only limiting feature is the moderate
pipelines may be needed for proper water application. All rapid permeability in the substratum, which causes
methods of irrigation are suitable, but furrow irrigation is hazard of ground water contamination from sew
the most common. Barnyard manure and commercial fer- lagoons. Lawns, shrubs, and trees grow well. Capabili
tilizer are needed for top yields. subclass Ile irrigated, IVe nonirrigated; Sandy P '
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 slo
winter wheat. The predicted average yield is 28 bushels This is a deep, well drained soil on plains at elevations
per acre. The soil is summer fallowed in alternate years 4,600 to 5,200 feet. It formed in mixed outwash deposi
to allow moisture accumulation. Generally precipitation is Included in mapping are small areas of soils that have
too low for beneficial use of fertilizer. dark surface layer and small areas of soils that ha
Stubble mulch fanning, 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 Obey soil is gra •
Terracing also may be needed to control water erosion. brown fine sandy clay loam about 8 inches thick. The su
The potential native vegetation on this range site is soil is yellowish brown and very pale brown line sap
dominated by sand bluestem, sand reedgrass, and blue loam about 12 inches thick. The substratum to a depth
grams. 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
production ranges from 2,200 pounds per acre in favors- moderate. The effective rooting depth is 60 inches
WELD COUNTY, COLORADO, SOUTHERN PART 33
le Surface runoff is medium, and the erosion hazard is ment, especially in areas of intensive agriculture. Range-
land wildlife, for example, the pronghorn antelope, can be
litigated areas this soil is suited to the crops corn- attracted by developing livestock watering facilities,
grown in the area. Perennial grasses and alfalfa or managing livestock grazing, and reseeding where needed.
grown crops should be grown at least 50 percent of Rapid expansion of Greeley and the surrounding area
. Contour ditches and corrugations can be used in has resulted in urbanization of much of this Olney soil.
close grown crops and pasture. Furrows, con- The soil has good potential for urban and recreational
furrows,and cross slope furrows are suitable for row development The only limiting feature is the moderately
Sprinkler irrigation is also desirable. Keeping til- rapid permeability in the substratum, which causes a
to a minimum and utilizing crop residue help to con- hazard of ground water contamination from sewage
erosion. Maintaining fertility is important. Crops lagoons. Lawns, shrubs, and trees grow well. Capability
to applications of phosphorus and nitrogen. subclass [Ile irrigated, IVe nonirrigated; Sandy Plains
anirrigated areas this soil is suited to winter wheat, range site.
, and sorghum. Most of the acreage is planted to 49—Osgood sand, 0 to 3 percent slopes. This is a deep,
wheat. The predicted average yield is 25 bushels well drained soil on smooth plains at elevations of 4,680 to
acre. The soil is summer followed in alternate years 4,900 feet It formed in eolian sands. Included in mapping
moisture accumulation. Generally precipitation is are small areas of soils that have a subsoil within 20
for beneficial use of fertilizer. inches of the surface. Also included are small areas of
le mulch fanning, striperopping, and minimum ill- soils that have a loam and sandy clay loam subsoil.
are needed to control soil blowing and water erosion. Typically the surface layer of this Osgood soil is gray-
also may be needed to control water erosion. ish brown sand about 22 inches thick. The subsoil is
potential native vegetation on this range site is brown sandy loam about 12 inches thick. The substratum
by sand bluestem, sand reedgrass, and blue to a depth of 60 inches is pale brown loamy sand and
Needleandthread, switchgrass, sideoats grams, sand
western wheatgrass are also prominent Potential Permeability is moderately rapid. Available water
n ranges from 2,200 pounds per acre in favors- rapacity is moderate. The effective rooting depth is 60
to 1,800 pounds in unfavorable years. As condi- inches or more. Surface runoff is very slow, and the ero-
deteriorates, sand bluestem, sand reedgrass, and slim hazard is low.
s decrease and blue grams, sand dropseed, and This soil is suited to limited cropping. Intensive
sage increase. Annual weeds and grasses invade the cropping is hazardous because of erosion. The cropping
as range condition becomes poorer. system should be limited to such close grown crops as el-
ement of vegetation on this soil should be based faVa, wheat, and barley. This soil also is suited to ir-
g half and leaving half of the total annual produe- rigated pasture. A suitable cropping system is 3 to 4
Seeding is desirable if the range is in poor condition years of alfalfa followed by 2 years of corn and small
bluestem, sand reedgrass, switchgrass, sideeate grain and alfalfa seeded with a nurse crop.
blue grams, pubescent wheatgrass, and crested Closely spaced contour ditches or sprinklers can be
s are suitable for seeding. The grass selected used in irrigating close grown crops. Contour furrows or
meet the seasonal requirements of livestock- It can sprinklers should be used for new crops. Applications of
seeded into a clean, firm sorghum stubble, or it an be nitrogen and phosphorus help in maintaining good produc-
into a firm prepared seedbed. Seeding early in tim
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
to this soil. Soil blowing, the principal hazard in grams, needleandthread, little bluestem, and blue grama.
blishing trees and shrubs, can be controlled by col- Potential production ranges from 2,500 pounds per acre in
ting only in the tree row and by leaving a strip of favorable years to 1,800 pounds in unfavorable years. As
tation between the rows. Supplemental irrigation range condition deteriorates, the sand bluestem,
y be needed at the time of planting and during dry switchgrass, sand reedgrass, sideoats grama, and little
•ods.Trees that are best suited and have good survival bluestem decrease; forage production drops; and sand
Rocky Mountain juniper, eastern redcedar, ponderosa sage increases. Undesirable weeds and annuals invade
, Siberian elm, Russianolive, and hackberry. The and "blowout" conditions can occur as range condition
bs best suited are skunkbush sumac, lilac, and Sberi- becomes poorer.
peashrub. Management of vegetation on this soil should be based
Wildlife is an important secondary use of this soil The on taking half and leaving half of the total annual produc-
pland areas provide favorable habitat for ring-necked lion. Seeding is desirable if the range is in poor condition.
asant and mourning dove. Many nongame species an Sand bluestem, sand reedgrass, indiangrass, switchgrass,
attracted by establishing areas for nesting and escape sideoats grama, little bluestem, and blue grama are suits-
ever. For pheasants, undisturbed nesting cover is essen- ble for seeding. Because this soil is susceptible to soil
h al and should be included in plans for habitat develop blowing, the grasses should be seeded with an interseeder
w
48 SOIL SURVEY
Management of vegetation on this soil should be based Windbreaks and environmental plantings are gene
on taking half and leaving half of the total annual produc- suited to this soil. Soil blowing, the principal hazard
tion. Seeding is desirable if the range is in poor condition. establishing trees and shrubs, can be controlled by
Sand bluestem, sand reedgrass, switchgrass, sideoats tivating only in the tree row and by leaving a strip
grama, blue grams, pubescent wheatgrass, and crested vegetation between the rows. Supplemental irriga '
wheatgrass are suitable for seeding. The grass selected may be necessary at the time of planting and during
should meet the seasonal requirements of livestock It can dry periods. Trees that are best suited and have
be seeded into a clean,firm sorghum stubble, or it can be survival are Rocky Mountain juniper, eastern redce.
drilled into a firm prepared seedbed. Seeding early in ponderosa pine, Siberian elm, Russian-olive, and hack.
spring has proven most successful. ry.The shrubs best suited are skunkbush sumac, lilac,
Windbreaks and environmental plantings are fairly well Siberian peashrub.
suited to this soil. Blowing sand and low available water Wildlife is an important secondary use of this
capacity are the principal hazards in establishing trees Ring-necked pheasant, mourning dove, and many n.
and shrubs. This soil is so loose that trees should be game species can be attracted by establishing areas ,
planted in shallow furrows and vegetation maintained nesting and escape cover. For pheasants, undist
between the rows. Supplemental irrigation may be needed nesting cover is essential and should be included in p
to insure survival Trees that are best suited and have for habitat development, especially in areas of intens'
good survival are Rocky Mountain juniper, eastern agriculture*
redcedar, ponderosa pine, and Siberian elm. The shrubs This soil has good potential for urban and recreatio•
best suited are skunkbusb sumac, titan, and Siberian development. Lawns, shrubs, and trees grow well.
peashrub only limiting feature is the rapid permeability in the s
Wildlife is an important secondary use of this ant Ran- stratum, which causes a hazard of ground water c
lamination from sewage lagoons. Capability subclass
viand wildlife, for example, the pronghorn antelope, can irrigated.
be attracted by developing livestock watering facilities, 76—Vona sandy loam, 1 to 3 percent slopes. This '
managing livestock grazing,and reseeding where needed. deep, well drained soil on plains and high terraces
This soil has good potential for urban and recreational elevations of 4,600 to 5,200 feet It formed in eolian
development Once established, the lawns shrubs, and alluvial deposit& Included in mapping are some leve
trees grow well. The primary limiting soil feature is the area Also included are small areas of soils that hay:
rapid permeability in the substratum, which causes a loamy substratum and areas of soils that are non
hazard of ground water contamination from sewage ous to a depth of 60 inches.
lagoons. In places recreational development is limited by Typically the surface layer of this Vona soil is gra
the susceptibility to soil blowing. Capability subclass VIe brown sandy loam about 10 inches thick The subsoil
irrigated, VIe nonirrigated; Sandy Plains range site. brown fine sandy loam about 18 inches thick The s
75—Vona sandy loam, 0 to 1 percent slopes. This is a stratum to a depth of 60 inches is sandy loam.
deep, well drained soil on high terraces at elevations of permeability is moderately rapid. Available w:
4,650 to 4,950 feet It formed in alluvial deposits. Included capacity is moderate. The effective rooting depth is
in mapping are some leveled areas and small areas of inches or more. Surface runoff is slow, and the e ...
•
soils that have a loamy substratum. hazard is low.
Typically the surface layer of this Vona soil is grayish In irrigated areas this soil is suited to all crops ci.
brown sandy loam about 10 inches thick. The subsoil is monly grown in the area, including corn, sugar . _
brown fine sandy loam about 20 inches thick. The sub- beans, alfalfa, small grain, and onions. An example o
stratum to a depth of 60 inches is sandy loam. suitable cropping system is 3 to 4 years of alfalfa
Permeability is moderately rapid. Available water lowed by corn,corn for silage, sugar beets, small grain,
capacity is moderate. The effective rooting depth is 60 beans. Land leveling, ditch lining, and installing pipe'
inches or more. Surface runoff is slow, and the erosion are needed for proper water applications.
hazard is low. All methods of irrigation are suitable, but furrow
This soil is used almost entirely for irrigated crops. It rigation is the most common. Barnyard manure and
is suited to all crops commonly grown in the area, includ- mercial fertilizer are needed for top yields
ing corn, sugar beets, beans, alfalfa (fig. 7), small grain, Windbreaks and environmental plantings are gene
potatoes, and onions. An example of a suitable cropping suited to this soil. Soil blowing, the principal hazard
system is 3 to 4 years of alfalfa followed by corn,corn for establishing trees and shrubs, can be controlled by .
silage, sugar beets, small grain, or beans. The rapidly tivating only in the tree row and by leaving a strip
permeable substratum slightly restricts some crops. vegetation between the rows. Supplemental irriga.
All methods of irrigation are suitable, but furrow ir- may be necessary at the time of planting and during
rigation is the most common. Proper irrigation manage- periods. Trees that are best suited and have good survi
ment is essential. Barnyard manure and commercial fertil- are Rocky Mountain juniper, eastern redcedar, ponde .
izer are needed for top yields. pine, Siberian elm, Russian-olive, and hackberry.
WELD COUNTY, COLORADO, SOUTHERN PART 49
L
are skunkbush sumac, lilac, and Siberi- and switebgasa decrease and blue grams, sand dropseed,
and sand sage increase. Annual weeds and grasses invade
portant secondary use of this soil. The the site as range condition becomes poorer.
ovide favorable habitat for ring-necked Management of vegetation on this soil should be based
rning dove. Many nongame species can on taking half and leaving half of the total annual produc-
stablishing areas for nesting and escape tioa Seeding is desirable if range is in poor condition.
ts, undisturbed nesting cover is essen- Sand hloeatese, sand reedgrass, switchgrass, sideoats
e included in plans for habitat develop- grams, bore game, pubescent wheatgrass, and crested
n areas of intensive agriculture. Range- wheatgram are suitable for seeding. The grass selected
example, the pronghorn antelope, can be should meet the seasonal requirements of livestock. It can
veloping livestock watering facilities, be seeded into a dean,firm sorghum stubble, or it can be
grazing,and reseeding where needed. drilled into a firm prepared seedbed. Seeding early in
ood potential for urban and recreational spring has proven mod successful.
wns, shrubs, and trees grow well. The Windbreaks and environmental plantings generally are
ure is the rapid permeability in the sub- suited to the not Sail blowing, the principal hazard in
auses a hazard of ground water con- estahisbing trees and shrubs, can be controlled by cul-
sewage lagoons. Capability subclass lie tinting =blithe tree row and by leaving a strip of
nirrigated; Sandy Plains range site. vegetation between the rows. Supplemental irrigation
y loam, 3 to 5 percent slopes. This is a may be needed at the time of planting and during dry
soil on plains at elevations of 4,600 to perods.Trees drat are bed suited and have good survival
ormed in eolian deposits. Included in are Rocky Mabaa juniper, eastern redcedar, ponderosa
ll areas of soils that have a loamy sub- pine, Sbmsn b, Ssaianolive, and hackberry. The
as of soils that are noncalcareous to a shrubs bed awed nee akonkbush sumac, lilac and Siberi-
anpsb.
urface layer of this Vona soil is grayish WIWe a an important secondary use of this soil. The
m about 8 inches thick. The subsoil is cropland sea provde favorable habitat for ring-neckedloam about 15 inches thick. The sub- pheo aad maasig dove. Many nongame species can
of 60 inches is sandy loam. be attracted by safabiahing areas for nesting and escape
is moderately rapid. Available water cows: Far p- - -undisturbed nesting cover is essen-
ce. The effective rooting depth is 60 tial ad abate be ianded in plans for habitat develop-
urface runoff is medium, and the erosion mesa,eapeeilb a aces of intensive agriculture. Range-
lad widif, orap1a the pronghorn antelope, can be
reas this soil is suited to the crops coon- attractd by dssalapinlivestock watering facilities,
the area. Perennial grasses and alfalfa or mgsgk eWkgng,and reseeding where needed.
should be grown at least 50 percent of This ad boi potential for urban and recreational
ditches and corrugations can be used in devel - Isar shrubs, and trees grow well. The
grown crops and pasture. Furrows, con- only Slag fse s the rapid permeability in the sub-
cross slope furrows are suitable for row strt . with ems a hazard of ground water con-
irrigation is also desirable. Keeping tiI- tamstia free auwa lagoons. Capability subclass IIIe
and utilizing crop residue help to con- irrigated,Vie amsrri ted;Sandy Plains range site.
aintaining fertility is important. Crops 711 -Weld Ina.i W 1 percent elopes. This is a deep,
of phosphorus and nitrogen. wei dialed ad un smooth plains at elevations of 4,850 to
areas this soil is suited to winter wheat, 5`000 feat It isad in eolian deposits. Included in
Mostoftheacreageisplantedto mappngseareasofsoilsthathaveasubsoilof
e predicted average yield is 28 bushels lam and igit dw lam Also included are some leveled
a s summer fallowed in alternate years areaaccumulation. Generally precipitation is Tjpg: the assle layer of this Weld soil is brown
beneficial use of fertilizer. loss abaat 1.- ck.The subsoil is brown and pale
driperopping, and minimum tillage are brews boy d' bra and light clay about 20 inches
sal blowing and water erosion. Tense- thick.The abatsI—to a depth of 60 inches is silt loam.
needed to control water erosion. Pere a s orbs. Available water capacity is high.
a ive vegetation on this range site s The effenae acr —depth is 60 inches or more. Surface
av l bluestem, sand reedgrass, and blue runes dew,ad the erosion hazard is low.
, switchgrass, sideoats grams, '1W ad is ad almost entirely for irrigated crops. It
are also prominent. Potential is sated to an asps commonly grown in the area includ-
tr m 2,200 pounds per acre in favors- sg an,n— laas,beans,alfalfa, small grain, potatoes,
pounds in unfavorable years. As range and area A.wan=of a suitable cropping system is 3
the sand bluestem, sand reedgrasa, to 4 lees d a-- followed by corn, corn for silage,
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