HomeMy WebLinkAbout830386.tiff AR193C141
ORDINANCE NO. 108
PERMIT NO. 83-19
PERMIT FOR PLOWING GRASSLAND
APPLICANT NAME: Gary W. Smith
ADDRESS: Box 26 -tti
Hereford, CO 80732
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LEGAL DESCRIPTION OF PROPERTY TO BE CULTIVATED (Map delineating
' the proposed land use change attached) :
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W1 SWa NE1, -t- Pt. W' SW4 NWa, t Pt. NWa SW',-f- NEa SWQ, ± -
W'A W1 SSE1/2 Section 2 , T11 N, R63W c
APPROVED SOIL CONSERVATION PLAN ATTACHED. Yes _
PERMIT ISSUED BY THE CLERK TO THE BOARD OF COUNTY COMMISSIONERS
OF WELD COUNTY, COLORADO.72)11.4916
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G Weld County Clerk & Recorder
DATEJ '�° cfp�/ 3 and Clerk to the Board
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) " 1 - ' Deputy County Clerk
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Ths 'p�ei't• is issued pursuant to Weld County Ordinance No . 108
adoptedaby' the Weld County Board of County Commissioners
on May 19, 1982 , and requiring the issuance of permits for
the plowout and cultivation of grassland. Pursuant to Ordi-
nance No . 108, the landowner is required to follow a conserva-
tion plan approved by the local Conservation District Board.
The landowner is advised to contact the local Soil Conserva-
tion District Board for any amendments or updates to the
Conservation Plan .
830386
7�� v //LE- JUNE /3 /9/.3
/ / V- - ---.. state_- . 4 Township _,../11Y Range 63 A/ , County.. ._. �-�
ORDINANCE NO. 108 v PERMIT NO. Dg'/4
R 0999 REC 01 9301 .1 06/14/83 1 2'. : 1 $0 00 2/030
F 0 /77 MARY ANN F EUEFi.`.i.i.E l:N CLERK & RECORDER WELD CO, CO
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i FORM 50
West Greeley Soil Conservation District ,V
P.O. Box 86 - Greeley, Colorado 80632 -: -,
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RESOURCE OR LAND USE PLAN REVIEW D. 71
71 in
APPLICANT PROPERTY OWNER z
Name: Gary W.- Smith Name: SAME (Gary Smith)
Address: Box 26 Address:
Hereford, CO 80732
DATE OF REVIEW: June 6, 1983 rn
ACREAGE BY LAND USE IN CONSERVATION PLAN:
131 ac. of grassland to be converted to non-irrigated cropland 1; -0.
LEGAL DESCRIPTION OF PROPERTY TO BE CULTIVATED: (Map delineating the proposed land use :-
change attached)
Wk SWk NEk + Pt. WAI SWk NW's +IPt.NWk SW's + NE'k SW's + W W SEk Section 2, A:
T11N, R63W V
PLAN DISPOSITION: Approved as presented.
COMMENTS:
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.:4/s T R1 � "' y WEST GREELEY SOIL CONSERVATION DISTRICT BOARD
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CONSERVATION - DEVELOPMENT - SELF-GOVERNMENT (Rev. 4/83)
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INSTRUCTIONS
PLANNING AND APPLICATION RECORD
FOR STUBBLE MULCHING
Field Number or Name-Field designation as shown on the Conservation Plan Map.
Acres-From the Conservation Plan Map.
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Soil of Major Hazard-The major soil of the field, or the soil of greatest hazard if it is more
significant to the field than the major soil. 7. .
Z ,
Wind Erodibility Soil Group (WEG)-Determined by soils from Guide for Determining Adequate —
Wind Erosion Control Systems (Guide) for the Work Unit or County location of the field.
Width of Exposure-The furthest distance the prevailing wind travels over the vulnerable part
of the field. z
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Specifications-Determined by use of appropriate Soil Loss tables from the Guide. This is7-0
-
determined in pounds of flat small grain residue equivalent. (If crops other than small
grains are grown, this figure must be converted to the grown crop by use of the Chart r
to Determine the Amount of Residue of Various Crops Needed to Equal a Given Amount —
of Flat Small Grain Stubble from the Guide.) '~
Application-This becomes a record by years of each field at planting time, or other appropriate '
time such as the late fall when new growth has reached its maximum before going dor- rn
rn
mant for the winter. Enter the amount of all residues on the soil surface, whether ..
fallowed or tilled, or of stubble standing from the previous crop. This should be con-
verted to flat small grain stubble equivalent. If a part of a field is cropped and the
remainder is fallowed, residue amounts should be entered from both areas.
r
UNITED STATES DEPARTMENT OF AGRICULTURE Technical Guide
Soil Conservation Service Section IV
Colorado All Field Offices
March 1983
STANDARDS AND SPECIFICATION
CONSERVATION CROPPING SYSTEM (acre) 328
Definition Specifications
Growing crops by using a 1. Dry Cropland
.71 rn
combination of needed cultural and
management measures. Cropping a. A cropping sequence such
'0
systems include rotations that as wheat fallow wheat- co c
oc
contain grasses and legumes, as sorghum-fallow or otherZ 73
well as rotations in which the systems will be applied
desired benefits are achieved that will provide adequate
without the use of such crops. residue for protection _ _
from wind and water z •::
Purpose ' erosion.
T: u
To improve or maintain good h. Crop residues will be
physical condition of the soil; managed in such a way that :.-2:j
protect the soil during periods soil loss is held to an re-1 a
when erosion occurs; help control acceptable amount.
weeds, insects , and diseases; and
meet the need and desire of c. The Universal Soil-Loss oi c0
,m
farmers for an economic return. Equation and Wind Erosion 04
k
Formula will be used to r
Conditions where practice applies determine adequacy of the
cropping system. >
On all cropland and on certain z
recreation and wildlife areas. 2. Irrigated Cropland
en
Planning Considerations a. The Soil Condition Rating
Indices for Irrigated Crops , r
An application of nitrogen should Agronomy Technical Note #52, E. u
be considered in the early stages will be used to determine _
of a high residue management the adequacy of the cropping b
program to replace that tied up in sequence and soil fertility
the decomposition process. management.
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UNITED STATES DEPARTMENT OF AGRICULTURE Technical Guide
Soil Conservation Service Section IV
Colorado All Field Offices
k February 1982
STANDARDS AND SPECIFICATION
CONSERVATION TILLAGE SYSTEM (Acre) 329
Standard
Definition
A form of noniversion tillage that 1 . Zero tillage, slot planting or -.^: k:
retains protective amounts of residue no-till.
mulch on the surface throughout the
7> 171
year. These include no-tillage, strip This is a method planting into
tillage, minimum tillage and other prior crop residue by disturb- -‹
types of noninversion tillage. ing only the immediate area of u
the row. Crop residue is left Z
Purpose on the surface for erosion -
control.
To protect the soil from erosion and =
help maintain or develop good soil 2. Strip tillage. i% ::
tilth, and desirable water infiltra- = -
tion rates and water storage. Tillage operations for seedbed _—
preparation are limited to a w,
f ®. Conditions where practice applies strip not to exceed one-third rIA
of the distance between rows.
On cropland and on certain other A protective cover of crop -•
lands where annual vegetation is residue remains on the
grown. balance. Tillage and plantingxi V
are accomplished in the same
Planning considerations operation.
cl
Conservation tillage provides a pro- 3. Minimum Tillage —
duction system that leaves crop resi-
dues on the surface after planting. Limiting the number of tillage E_
Crop residues are left standing as operations to those essential —
long as possible prior to the succeed- to control weeds , improve soil
ing crop to trap blowing snow. Herbi- aeration, permeability and
cides are used immediately following tilth. Sweeps, rod weeders or V
harvest, prior to and during planting, straight shank chisel imple-
to control volunteer grain and other ments will be used. CO
vegetation.
Specifications
This practice is most effective when
carried out in conjunction with other A. The primary objective is to
practices such as strip cropping, accomplish weed control with
terracing and contour farming. no tillage or with a limited
• number of conservation tillage
One of the following conservation operations, so that adequate
tillage systems should be used: amounts of crop residue can be
maintained for protection from
1444,
� erosion.
t TGN #182 2/82
F 0791 MARY ANN I°'I:::UERS i lii:IN CLERK & RECORDER WEALD CO, co
329-2—Conservation Tillage System
•
S. The minimum amount of crop residue left on the soil surface after
planting shall be 1 ,500 pounds per acre of corn or sorghum residue, or
500 pounds per acre of flat small grain residue or its equivalent.
C. Soil loss by water and wind shall be reduced to the loss tolerance
established for that soil. The Universal Soil Loss Equation and the
Wind Erosion formula can be used to arrive at the amount of residue
necessary to keep the soil loss within limits.
Table 1 - A Guide for Estimating Residue Reduction from Tillage Operations
Approximate Percent of
• Residue Reduction After
One Trip or Pass Over
Tillage Operation the Field
Rod Weeder 10
Sweeps (30" or more) 10
Rod Weeder and Semichisel 15
Field Cultivator - (16-18 inch sweeps) 25
Till Planter 20
Chisel Plow (straight shanks) 20
Chisel Plow (twisted shank) 50
One-Way or Tandem Disc 50
Moldboard Plow 75-100
D. On systems where tillage operations are permitted:
1 . Subsurface tillage equipment should be used to keep the residue on
the soil surface.
2. On soils that tend to crust, or with some slope to them, a chisel
type implement may need to be used after harvest to increase water
infiltration and reduce soil loss due to runoff.
3. Chemicals may be used to aid in reducing or eliminating tillage
operations. Use manufacturers labels or Colorado Weed Control
Handbook for specific rate recommendations. The following options
are recommended.
a. Fall sweep (4 inches deep) plus Atrazine. Fall sweep
immediately (within two weeks) after wheat harvest to kill
existing vegetation. Atrazine applied immediately following
fall sweep will kill volunteer wheat and weeds until the next
summer. Limit summer tillage operations prior to planting.
b. Apply a combination of non-selective contact or non-residual
herbicides (such as Paraquat or Roundup) plus Atrazine to kill
existing weeds and for long-term weed control. Limit summer
tillage operations.
j
TON 11182 2/82
Conservation Tillage System 329-3 141/4 c. Contact herbicide plus Bladex, Igran or other short residual
(45-60 days) may be used for spring application to eliminate
early spring and early summer tillage. Limit summer tillage
operations.
d. 2-40 Butyl Ester plus atrazine or a short residual triazine is
an economical alternative if approximately 90% of the fall weeds
are broadleaf. Limit summer tillage operations.
E. For no-till systems:
1. Conventional tillage operations will not be used to control volun- -,t
teer crop growth or annual forbs and grasses. On soils with a heavy
clay or silty surface that tend to seal, a light crust breaking may
be needed using sweeps or a chisel using straight shanks. r =?
a. Wheat-fallow (chemical only) - Use of chemicals to eliminate
tillage operations. The following is required: .t :
z
(1) Contact herbicides, such as Paraquat or Roundup, plus
atrazine or residual and tank mixes such as atrazine-Bladex
and atrazine-Igran shall be applied immediately following —
harvest to kill existing weeds and give long-term weed r: ^•..
control.
zh
A (2) A short residual herbicide may be used for spring applica-
tion if necessary to control weeds to substitute for
tillage operations normally used.
(3) A slot or no-till planter or grain drill shall be used that 2° •
will disturb not more than 25% of the soil surface. r17,
�.
b. Corn, sorghum, and small grains (chemical only) . Use of chemi- _
cals to eliminate tillage operations in irrigated cropland or
annual cropping systems. The following is required: _
(1) A contact herbicide plus Bladex, Igran or other short ,-n ^.
residual (45-60 days) may be used for spring application if
needed to control weeds to eliminate early spring and early
summer tillage.
(2) A slot or no-till planter or adequate grain drill shall be
-
used that will disturb not more than 25% of the soil
surface.
(3) Atrazine may he used in a wheat-sorghum-fallow or a wheat-
corn-fallow sequence.
F. Farmers must be made aware of the hazards involved in using residual
herbicides.
TGN 11182 2/82
329-4-Conservation Tillage System
1 . Caution must be exercised in use of atrazine on soils with a pH of
7.5 or higher.
2. Caution should be taken when applying long residual herbicides
annually so no overlap or carry-over effect of chemical occurs.
3 . A minimum of 20 gallons of water, preferably 30, will he needed to
get adequate coverage of chemical.
4 . For more uniform application, Large volume sprayers with wide stable
boom coverage are preferred over small units with narrow coverage.
The wider swath should result in fewer overlaps or skips. Dust
should be held to a minimum as it deactivates some herbicides.
Nozzle spacing should not be greater than 40 inches for uniform
distribution.
G. Specific chemical recommendations shall be in accordance with container
labels and/or Colorado Weed Control Handbook.
Trade names were used in this standard only to make the information more
understandable. This does not imply endorsement of certain products or —
criticism of products not named or mentioned.
No
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TGN #182 2/82
UNITED STATES DEPARTMENT OF AGRICULTURE Technical Guide
Ai n\ Soil Conservation Service Section IV
I
Colorado All Field Offices
October 1981
STANDARDS AND SPECIFICATIONS
CROP RESIDUE USE — (ac.) 344
Definition B. Each field will be evaluated for
potential wind and water erosion
Using plant residues to protect using the Wind Erosion Curves and
cultivated fields during critical the Universal Soil Loss Equation. —
erosion periods.
C. If only one of the erosion " "o
`` 'Purpose hazards a(wind or water) is signifi- � '
cant, the land treatment
To conserve soil moisture, increase plannedsothaterosion will - l
from
soil infiltration, reduce soil loss, wind nor water will exceed the
and improve soil tilth. designated "T" value for that soil.
a
m Condition where practice applies D. If both wind and water erosion _
are significant in a given field, -
On land where crop residues are land treatment shall be planned so
produced. that the total soil loss from wind
and water does not exceed the desig- -4n-
Specifications nated "T" value.
I. Non-Irrigated Small Grain - Use E. If the treatment is planned to _ ~
the "Guide for Wind Erosion Control control wind erosion the technician
on Cropland" or Agronomy Note #53 will record (1) the amount of
for guidance on amounts of residue residue required on the soil surface
required on the soil surface during at planting time, a` •
the
the critical wind erosion season. tered distance usually described as —
This will normally be considered as field width perpendicular to the
the amount of flat small grain prevailing winds, (3) rough-
stubble equivalent residue after the ness factor, i.e. , unridged,
T
planting operation. r
F. If the treatment is planned z Y
A. To calculate residue require- primarily to control water erosion,
ments, average the annual soil loss the technician will develop alterna- 4
for the entire rotation or wheat- tives in accordance with the
fallow cropping system. This method Universal Soil Loss Equation for (1) e
will show the benefits of residue length of slope (2) cropping
management for the entire cropping management factor and (3) erosion
system. If this method is used the control practice factor.
wind erosion curves will determine
the amount of residue needed but in
no case will the minimum requirement
be less than 500 lbs. per acre of
flat small grain stubble equivalent
".I' at planting time.
TGN #178
344-2 Crop Residue Use
C. Planning Considerations
i ,
ir
1 . Subsurface tillage equipment such as sweeps, blades and
rodweeders should be used for most tillage operations.
2. Chemical weed control to reduce the number of tillage operations
is beneficial in managing the residue.
3. Reducing field widths is an effective way to reduce the need for
large amounts of crop residue.
4. When inadequate residue is produced the soil surface will be
ridged by chiseling or listing.
II. Non-Irrigated Sorghums
A. Pounds of residue required through the critical wind erosion period
(November-May).
Crop and Spacing Minimun Required
Residue
1. Drilled sorghums on row 750!1
spacing of 20" or less
2. Forage sorghum on 100011
20" - 40" rows
3. Grain sorghum on 1500#
20" - 40" rows
When the above residue requirements are met, the practice will be considered
adequate to hold the soil loss to the acceptable "T" level.
B. Planning Considerations
1 . The above amounts of residue will be left on the soil surface
through May or until spring seedbed preparation which usually
occurs in early April. Spring seedbed preparation should result
in a ridged surface for wind erosion protection.
2. When inadequate residue is produced the soil surface will be
ridged by chiseling or listing. Soils coarser than sandy loam
usually require listing to provide satisfactory surface
roughness.
3. Grazing will be restricted on machine harvested crops when
marginal amounts of residue are produced.
USDA/SCS/Colorado/ 10/81 TGN 1/178
B 0999 RE:C 01 901 .41 06/1 4/83 1 2 : 1 6 $0. 00 >0/030}
0.79m; NARY ANN FEVER STEIN CLERK & RECORDER WELD CO, CO
Crop Rtoidue Use 344-3
III. Irrigated Crops
Avni
A. The pounds of residue required on the soil surface during the
critical erosion period are as follows.
Wind Erodibility Drilled Crops
Groups 20" rows or less Row Crops
1 & 2 1500 2500
3 & 4 1000 1750
5, 6 & 7 750 1000 —
B. Critical Erosion Periods (Modified for Necessary tillage)
1. W.E.G. 's 1&2 Sprinkler Irrigated — Maintain the required amounts
of residue until the planted crop has enough
g growth to protect
the soil. -
2. Gravity Irrigated Row Crops - Maintain the required amounts of z
residue as long as feasible after harvest. The cropping system z
and method of irrigation are to be considered. If fall plowing
destroys the residue, the field will be left rough and cloddy
until spring seedbed preparation, (about March 1st as a minimum). s
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TGN #178 USDA/SCS/COLORADO/ 10/81
UNITED STATES DEPARTMENT OF AGRICULTURE Technical Guide
Aran-*., Soil Conservation Service Section IV
Colorado All Field Offices
March 1983
STANDARDS AND SPECIFICATION
STRIPCROPPING, WIND (Code 589)
B. Strips will run approxi-
Standard mately
perpendicular to
the prevailing wind
Definition direction.
11 tri
Growing wind-resisting crops in C. Maximum Strip Widths
strips alternating with row crops (narrower strips provide
or fallow and arranged at angles better protection and
Xi
to offset adverse wind effects. require less protective 3 T
cover) .
Purpose 0
1. 0-2% slope, 660 feet z .0
To reduce wind velocity at the widths (40 rods) . z
soil surface, thereby reducing _—
soil blowing and damage to crops. 2. 2-5% slope, 330 feet
To trap snow and increase stored widths (20 rods) . —
soil moisture. . .°
3. 5% or greater slope, 165 H t
: "' Where applicable PP feet widths (10 rods) . z ;,
On cropland subject to soil D. Wheat stubble in the —
blowing and where needed as part protective strips will be
of a cropping system for snow left standing through the
catchment and moisture critical erosion period. 2" ••
conservation. (Nov. through May) . —
Specifications E. A minimum of 50011 of _
77
residue will be left on
Follow guidance set forth in the soil surface after17 e
"Guide for Wind Erosion Control planting for soils in T v
on Cropland in Great Plains WEG's 1 , 2 , 3 & 4. If the _E ti
States" (Revised 1976) , or Guide for Wind Erosion
Agronomy Technical Note /153, to Control or Technical Note
calculate widths of wind strips. 1153 indicate larger
amounts are needed, then -`
I. Wheat—Fallow Systems those amounts should be ` ti
left on the surface after
A. Strips of wheat will be planting.
planted alternately with
the stubble from the
previous crop; in
approximately equal
''"°'" widths to facilitate
rotation.
TGN #200
Striperopping, Wind :,.,9-2
3/83 TGN #200
-2- I' 'I
II. Annual Row Crop Systems `°
A. Strips of high residue producing crops will be' grown in alternate
strips with erosion susceptible crops. Strips will be approximately
perpendicular to the prevailing wind direction.
B. Width and spacing of protective strips:
1. Row Crop Plants — Minimum width of protective strips will be the
equivalent width of 4 rows spaced 40 inches apart. Spacing
between strips will not exceed 30 feet.
2. Drilled Plants — Minimum width of protective strips will be two
rows (12" — 20" spacing) and the spacing between strips will not s:
exceed 30 feet.
C. The protective crop will be harvested with a combine or mowed leaving _>
the stubble 12 to 18 inches tall. The protective residue will be
left on the soil surface through the critical wind erosion season0.
(Nov—May) or until the seedbed is prepared for the following crop m
which is expected to occur in early April. Spring seedbed
preparation should result in a ridged surface for wind erosion
protection. -
III. Perennial Tall Grass Barriers z
w
A. Only tall growing species such as tall wheatgrass , switchgrass , big "
bluestem, sand bluestem, Basin wildrye and Indiangrass will be
planted. Range site descriptions and Critical Area Planting
specifications will be used to determine specie adaptation.
_
B . Seedbed preparation will consist of only those operations necessary
to assure a firm soil condition relatively free of weeds. Planting in residue from a previous crop is acceptable. _
C. Colorado Agronomy Note No. 61 will be used to determine amounts of
seed to plant.
D. Barriers shall consist of at least two rows of grass spaced .10-40
inches apart as a minimum.
E. Optimum barrier spacing will be determined using the Guide for Wind _-
Erosion Control and will be designed as close to this optimum as
possible considering equipment widths.
F. Weed control will be practiced as needed to control competition until
grass is well established.
G. Barriers will be periodically mowed or clipped to a minimum height of
8-10 inches to encourage regrowth and prevent decadent stands from
developing.
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13 O;999 l:[r 01930141 06/14/83 12 : 16 $0..00 25/030
F )r OO M( ANN I-EU R Trm CLERK & lit..--_,ORDEI WELD CO, CO
Weld County, Colorado, Northern Part
1
4—Ascalon fine sandy loam, 0 to 6 percent slopes. 5—Ascalon fine sandy loam, 6 to 9 percent slopes
This deep, well drained soil is on smooth to moderately This deep, well drained soil is on moderately dissected
dissected plains. It formed in calcareous loamy alluvium. to highly dissected plains. It formed in calcareous loamy
Typically, the surface layer is dark brown fine sandy alluvium.
loam 8 inches thick. The subsoil is sandy clay loam 14 Typically, the surface layer is dark brown fine sandy
inches thick. The substratum to a depth of 60 inches or loam 6 inches thick. The subsoil is sandy clay loam 15
more is calcareous sandy loam. In some areas the inches thick. The substratum to a depth of 60 inches or
surface layer is loam. more is calcareous sandy loam. In some areas the
Included in this unit are small areas of Ascalon fine surface layer is loam.
sandy loam that has slopes of 6 to 9 percent, Olney fine Included in this unit are small areas of Altvan fine
sandy loam, and Otero sandy loam. Also included are sandy loam, Cascajo gravelly sandy loam, and Peetz
some areas of Rock outcrop. gravelly sandy loam. Also included are some areas of
Permeability of this Ascalon soil is moderate. Available Rock outcrop.
water capacity is high. Effective rooting depth is 60 Permeability of this Ascalon soil is moderate. Available
inches or more. Runoff is slow to medium, and the water capacity is high. Effective rooting depth is 60
hazard of water erosion is slight to moderate. The inches or more. Runoff is medium to rapid, and the
hazard of soil blowing is moderate. hazard of water erosion is high. The hazard of soil
This unit is used as nonirrigated cropland and blowing is moderate.
This unit is used as rangeland and nonirrigated
rangeland. Winter wheat is the main crop.
This unit is well suited to winter wheat, barley, oats, cropland. Areas of nonirrigated cropland are poorly
and sorghum. Because precipitation is not sufficient for suited for use as rangeland and should be seeded to
annual cropping, a cropping system that includes small adapted grasses.
grain and summer fallow is most suitable. Precipitation The potential plant community on this unit is mainly
usually is too low for crops on this unit to make efficient blue grama, western wheatgrass, sedges, and
use of fertilizer. buffalograss. The average annual production of air-dry
Maintaining crop residue on or near the surface vegetation ranges from 400 to 1,300 pounds.
If the range is overgrazed, the proportion of preferred
reduces runoff, reduces soil blowing, and helps to
maintain soil tilth and organic matter content. Stubble- forage plants decreases and the proportion of less
mulch farming, striperopping, and minimum tillage help to preferred forage plants increases. Therefore, livestock
control erosion and conserve moisture. Terraces reduce grazing preferred
species is maintained d s that the lnt balance
runoff and the risk of erosion and help to conserve of preferred is in the plant
moisture. community.
The potential plant community on this unit is mainly Range seeding is suitable if the range is in poor
blue grama, western weatgrnsy, sedges, and condition. The plants selected for seeding should meet
buffalograss. The average annual production of air-dry the seasonal requirements of practices that ha or are wildlife,suitableor
vegetation ranges from 500 to 1,500 pounds. both. Other management d nor
If the range is overgrazed, the proportion of preferred and rotationon this unit are proper range use, deferred grazing,
forage plants decreases and the proportion of less andprotecti grazing. If the plant oLor is disturbed,
preferred forage plants increases. Therefore, livestock layer results sn fr in m severe e isc needed.a Loss productivity the surface
grazing should be managed so that the desired balance the her o a decrease in and in
of preferred species is maintained in the plant gr potential of the soil to produce plants suitable for
community. grazing.
This unit is well suited to windbreaks and
Range seeding is suitable if the range is in poor
condition. The plants selected for seeding should meet environmental plantplanting
Supplemental dry al ds. may be
the seasonal requirements of livestock or wildlife, or needed when planting and during dry periods.
both. Other management practices that are suitable for This map unit is in capability Pla subclass site.
e.
use on this unit are proper range use, deferred grazing, nonirrigated,and in Loamy Plains range
and rotation grazing. If the plant cover is disturbed, 6—Ascalon-Blakeland complex, 3 to 15 percent
protection from erosion is needed. Loss of the surface slopes. This map unit is on alluvial and colluvial fans
layer results in a severe decrease in productivity and in and on moderately dissected to highly dissected plains.
the potential of the soil to produce plants suitable for This unit is 50 percent Ascalon fine sandy loam and
grazing. 30 percent Blakeland loamy sand. The components of
This unit is well suited to windbreaks and this unit are so intricately intermingled that it was not
environmental plantings. Supplemental irrigation may be practical to map them separately at the scale used.
needed when planting and during dry periods. Included in this unit is about 20 percent Bushman fine
This map unit is in capability subclass IVe, sandy loam, Bresser sandy loam, and Wages fine sandy
nonirrigated, and in Loamy Plains range site. loam.
8 09≥s9 4._...11 0/ 930141 06/.1 .4/83 1 y : ' $0.00 26/0:30
F 0001 I..J Y ANN EEUERs r IN CLERK & ,.r.ECORDER WIELD CO, CO
26 Soil survey
If the range is overgrazed, the proportion of preferred The Mitchell soil is deep and well drained. It formed in
forage plants decreases and the proportion of less calcareous loamy alluvium. Typically, the surface layer is
preferred forage plants increases. Therefore, livestock brown and pale brown silt loam 7 inches thick. The
grazing should be managed so that the desired balance subsurface layer is silt loam 5 inches thick. The
of preferred species is maintained in the plant underlying material to a depth of 60 inches or more is silt
community. loam. The soil is calcareous throughout.
Range seeding is suitable if the range is in poor Permeability of the Mitchell soil is moderate. Available
condition. The plants selected for seeding should meet water capacity is high. Effective rooting depth is 60
the seasonal requirements of livestock or wildlife, or inches or more. Runoff is slow to medium, and the
both. Other management practices that are suitable for hazard of water erosion is slight to moderate. The
use on this unit are proper range use, deferred grazing, hazard of soil blowing is moderate.
and rotation grazing. If the plant cover is disturbed, Most areas of this unit are used as rangeland. A few
protection from erosion is needed. Loss of the surface areas are used as nonirrigated cropland. Winter wheat is
layer results in a severe decrease in productivity and in the main crop.
the potential of the soil to produce plants suitable for The potential plant community on the Kim soil is
grazing. mainly blue grama, western wheatgrass, sedges, and
This unit is well suited to winter wheat, barley, oats, buffalograss. The average annual production of air-dry
and sorghum. Low annual precipitation is the main vegetation ranges from 500 to 1,500 pounds. The
limitation for the crops that can be grown on this unit. potential plant community on the Mitchell soil is mainly
Because precipitation is not sufficient for annual blue grama, western wheatgrass, and fourwing saltbush.
cropping, a cropping system that includes small grain The average annual production of air-dry vegetation
and summer fallow is most suitable. Precipitation usually ranges from 500 to 1,600 pounds.
is too low for crops on this unit to make efficient use of If the range is overgrazed, the proportion of preferred
fertilizer. forage plants decreases and the proportion of less
Maintaining crop residue on or near the surface preferred forage plants increases. Therefore, livestock
reduces runoff, reduces soil blowing, and helps to grazing should be managed so that the desired balance
maintain soil tilth and organic matter content. Stubble- of preferred species is maintained in the plant
mulch farming, striperopping, and minimum tillage help to community.
control erosion and conserve moisture. Terraces reduce Range seeding is suitable if the range is in poor
runoff and the risk of erosion and help to conserve condition. The plants selected for seeding should meet
moisture. the seasonal requirements of livestock or wildlife, or
This unit is well suited to windbreaks and both. Other management practices that are suitable for
environmental plantings. Supplemental irrigation may be use on this unit are proper range use, deferred grazing,
needed when planting and during dry periods. and rotation grazing. If the plant cover is disturbed,
This map unit is in capability subclass IVe, protection from erosion is needed. Loss of the surface
nonirrigated, and in Loamy Plains range site. layer results in a severe decrease in productivity and in
the potential of the unit to produce plants suitable for
31—Kim-Mitchell complex, 0 to 6 percent slopes. grazing.
This map unit is on smooth to slightly dissected plains This unit is suited to winter wheat, barley, oats, and
and alluvial fans. sorghum. Because precipitation is not sufficient for
This unit is about 45 percent Kim loam and 40 percent annual cropping, a cropping system that includes small
Mitchell silt loam. The components of this unit are so grain and summer fallow is most suitable. Precipitation
intricately intermingled that it was not practical to map usually is too low for crops on this unit to make efficient
them separately at the scale used. use of fertilizer.
Included in this unit are small areas of Haverson, Maintaining crop residue on or near the surface
Thedalund, and Keota loams. Included areas make up reduces runoff, reduces soil blowing, and helps to
15 percent of the total acreage. The percentage varies maintain soil tilth and organic matter content. Stubble-
from one area to another. mulch farming, striperopping, and minimum tillage help to
The Kim soil is deep and well drained. It formed in control erosion and conserve moisture. Terraces reduce
calcareous loamy alluvium. Typically, the surface layer is runoff and the risk of erosion and help to conserve
light brownish gray loam 3 inches thick. The subsurface moisture.
layer is light brownish gray clay loam 4 inches thick. The This unit is well suited to windbreaks and
underlying material to a depth of 60 inches or more is environmental plantings. It is limited mainly by the hazard
light gray loam. The soil is calcareous throughout. of soil blowing where the surface layer is barren of
Permeability of the Kim soil is moderate. Available vegetation. Only small areas or strips should be cleared
water capacity is high. Effective rooting depth is 60 for tree planting. Soil blowing can be reduced by
inches or more. Runoff is medium to rapid, and the cultivating only in the tree rows and by leaving a strip of
hazard of water erosion is slight to moderate. The vegetation between the rows. Supplemental irrigation
hazard of soil blowing is moderate. may be needed when planting and during dry periods.
`.;, .1., i r: 1 . 1 ,i..:,. 14/83 12 : 16 4;0.c i• ) r '0:3
i 0s to s f , .s Ii
r�nPir r�- I'I' tif..a�: 11....1'N (.:I I I'8t �, P41 Lt)Fi l. I.I h•.L..I7 I'll, C.O
Weld County, Colorado, Northern Part 7
1
This map unit is in capability subclass IVe, both. Other management practices that are suitable for
nonirrigated. The Kim soil is in Loamy Plains range site, use on this unit are proper range use, deferred grazing,
and the Mitchell soil is in Siltstone Plains range site. and rotation grazing. If the plant cover is disturbed,
protection from erosion is needed. Loss of the surface
32—Kim-Mitchell complex, 6 to 9 percent slopes. layer results in a severe decrease in productivity and in
This map unit is on moderately dissected to highly the potential of the unit to produce plants suitable for
dissected plains and alluvial and colluvial fans. grazing.
This unit is about 45 percent Kim loam and 35 percent This unit is well suited to windbreaks and
Mitchell silt loam. The components of this unit are so environmental plantings. It is limited mainly by the hazai
intricately intermingled that it was not practical to map of soil blowing where the surface layer is barren of
them separately at the scale used. vegetation. Only small areas or strips should be cleared
Included in this unit are small areas of Haverson loam, for tree planting. Soil blowing can be reduced by
Thedalund loam, Keota loam, and soils that have slopes cultivating only in the tree rows and by leaving a strip 01
of less than 6 percent. Included areas make up 20 vegetation between the rows. Supplemental irrigation
percent of the total acreage. The percentage varies from may be needed when planting and during dry periods.
one area to another. This map unit is in capability subclass Vle,
The Kim soil is deep and well drained. It formed in nonirrigated. The Kim soil is in Loamy Plains range site,
calcareous loamy alluvium and colluvium. Typically, the and the Mitchell soil is in Siltstone Plains range site.
surface layer is light brownish gray loam 3 inches thick.
The subsurface layer is light brownish gray clay loam 4 33—Kim-Shingle complex, 6 to 30 percent slopes.
inches thick. The underlying material to a depth of 60 This map unit is on plains, breaks, and alluvial and
inches or more is light gray loam. The soil is calcareous colluvial fans.
throughout. This unit is about 60 percent Kim loam and 20 percer
Permeability of the Kim soil is moderate. Available Shingle clay loam. The Kim soil is on moderately
water capacity is high. Effective rooting depth is 60 dissected to highly dissected plains, alluvial fans, and
inches or more. Runoff is medium to rapid, and the colluvial fans. The Shingle soil is on moderately
hazard of water erosion is high. The hazard of soil dissected to highly dissected breaks. The individual
blowing is moderate. components of this unit are in areas so narrow that it
The Mitchell soil is deep and well drained. It formed in was not practical to map them separately at the scale
calcareous loamy alluvium and colluvium. Typically, the used.
surface layer is brown silt loam 7 inches thick. The Included in this unit are small areas of Cascajo soils.
subsurface layer is very pale brown silt loam 5 inches Also included are small areas of Rock outcrop and soils
thick. The underlying material to a depth of 60 inches or that are moderately deep to shale. Included areas make
more is very pale brown silt loam. The soil is calcareous up about 20 percent of the total acreage. The
throughout. percentage varies from one area to another.
Permeability of the Mitchell soil is moderate. Available The Kim soil is deep and well drained. It formed in
water capacity is high. Effective rooting depth is 60 calcareous loamy alluvium and colluvium. Typically, the
inches or more. Runoff is medium to rapid, and the surface layer is light brownish gray loam 3 inches thick.
hazard of water erosion is high. The hazard of soil The subsurface layer is clay loam 4 inches thick. The
blowing is moderate. underlying material to a depth of 60 inches or more is
This unit is used as rangeland. loam. The soil is calcareous throughout.
The potential plant community on the Kim soil is Permeability of the Kim soil is moderate. Available
mainly blue grama, western wheatgrass, sedges, and water capacity is high. Effective rooting depth is 60
buffalograss. The average annual production of air-dry inches or more. Runoff is medium to rapid, and the
vegetation ranges from 400 to 1,300 pounds. The hazard of water erosion is high to very high. The hazarc
potential plant community on the Mitchell soil is mainly of soil blowing is moderate.
blue grama, western wheatgrass, and fourwing saltbush. The Shingle soil is shallow and well drained. It forme(
The average annual production of air-dry vegetation in calcareous loamy or clayey residuum derived from
ranges from 400 to 1,500 pounds. shale. Typically, the surface layer is yellowish brown cle
If the range is overgrazed, the proportion of preferred loam 4 inches thick. The underlying material is clay boar
forage plants decreases and the proportion of less 7 inches thick. Shale is at a depth of 11 inches. Depth •
preferred forage plants increases. Therefore, livestock shale ranges from 10 to 20 inches. The soil is
grazing should be managed so that the desired balance calcareous throughout.
of preferred species is maintained in the plant Permeability of the Shingle soil is moderate. Available
community. water capacity is low. Effective rooting depth is 10 to 2(
Range seeding is suitable if the range is in poor inches. Runoff is medium to rapid, and the hazard of
condition. The plants selected for seeding should meet water erosion is high to very high. The hazard of soil
the seasonal requirements of livestock or wildlife, or blowing is slight.
T.; ,0 999 ,,r.:.(.: 0 1 930 141 06/1 4/0 3 1 2 : t < $0.00 20;',030
I- x'003 IRY ANN El Il1=R TIC14 1:;I..I_Idc & ,'I (USD1 WIE:I_ 1) ('ti, 1'0
42
Soil survey
This map unit is in capability subclass IVe, is fine sandy loam 12 inches thick. Sandstone is at a
nonirrigated, and in Loamy Plains range site. depth of 19 inches. Depth to sandstone ranges from 10
62-Stoneham fine sandy loam, 6 to 9 percent to 20 inches. The soil is calcareous throughout.
slopes. This deep, well draind soi is on moderately Included in this unit are small areas ue of Shingle loam
dissected to highly dissected plains. It formed in f Rock outcrop. s soils. Also included are some areas
calcareous loamy alluvium. of outcrop.
Permeability w f this Tassel soil is f moderately ot depth
Typically, the surface layer is pale brown fine sandy Available water capacity is low. Effective rooting depth is
loam 5 inches thick. The upper 3 inches of the subsoil is 10 to 20 inches. Runoff is medium, and the hazard of
clay loam, and the lower 6 inches is calcareous loam. water erosion is moderate to very high. The hazard of
The substratum to a depth of 60 inches or more is soil blowing is moderate.
calcareous sandy loam. This unit is used as rangeland.
Included in this unit are small areas of Kim soils, The potential plant community on this unit is mainly
Mitchell soils, Otero sandy loam, and soils that have blue grama, sideoats grama, little bluestem, and
slopes of less than 6 percent. Included areas make up threadleaf sedge. The average annual production of air-
about 20 percent of the total acreage. dry vegetation ranges from 400 to 1,000 pounds.
Permeability of this Stoneham soil is moderate. If the range is overgrazed, the proportion of preferred
Available water capacity is moderate. Effective rooting forage plants decreases and the proportion of less
depth is 60 inches or more. Runoff is rapid, and the preferred forage plants increases. Therefore, livestock
hazard of water erosion is high. The hazard of soil grazing should be managed so that the desired balance
blowing is moderate. of preferred species is maintained in the plant
This unit is used as rangeland. community.
The potential plant community on this unit is mainly Management practices that are suitable for use on this
blue grama, western wheatgrass, sedges, and unit are proper range use, deferred grazing, and rotation
buffalograss. The average annual production of air-dry grazing. If the plant cover is disturbed, protection from
vegetation ranges from 400 to 1,300 pounds. erosion is needed. Loss of the surface layer results in a
If the range is overgrazed, the proportion of preferred severe decrease in productivity and in the potential of
forage plants decreases and the proportion of less the soil to produce plants suitable for grazing.
preferred forage plants increases. Therefore, livestock This unit is poorly suited to windbreaks and
grazing should be managed so that the desired balance environmental plantings. The main limitations are shallow
of preferred species is maintained in the plant rooting depth, low available water capacity, and
community. steepness of slope.
Range seeding is suitable if the range is in poor This map unit is in capability subclass VIe,
condition. The plants selected for seeding should meet nonirrigated, and in Sandstone Breaks range site.
the seasonal requirements of livestock or wildlife, or
both. Other management practices that are suitable for 64—Terry sandy loam, 0 to 3 percent slopes. This
use on this unit are proper range use, deferred grazing, moderately deep, well drained soil is on smooth to
and rotation grazing. If the plant cover is disturbed, moderately dissected plains. It formed in calcareous
protection from erosion is needed. Loss of the surface sandy residuum derived from sandstone.
layer results in a severe decrease in productivity and in Typically, the surface layer is grayish brown sandy
the potential of the soil to produce plants suitable for loam 5 inches thick. The subsoil is sandy loam 12 inches
grazing. thick. The substratum is calcareous loamy sand 15
This unit is well suited to windbreaks and inches thick. Sandstone is at a depth of 32 inches.
environmental plantings. It has few limitations. Depth to sandstone ranges from 20 to 40 inches.
Supplemental irrigation may be needed when planting Included in this unit are small areas of Olney fine
and during dry periods. Summer fallow, cultivation for sandy loam, Vona sandy loam, Tassel loamy fine sand,
weed control, and selection of adapted plants are and soils that have a subsoil of sandy clay loam and
needed to insure establishment and survival of have sandy shale at a depth of 20 to 40 inches. Included
seedlings. areas make up about 20 percent of the total acreage.
This map unit is in capability subclass VIe, Permeability of this Terry soil is moderately rapid.
nonirrigated, and in Loamy Plains range site. Available water capacity is moderate. Effective rooting
depth is 20 to 40 inches. Runoff is slow, and the hazard
63—Tassel loamy fine sand, 5 to 20 percent of water erosion is slight. The hazard of soil blowing is
slopes. This shallow, well drained soil is on moderately moderate.
dissected to highly dissected plains. It formed in Most areas of this unit are used as rangeland. A few
calcareous loamy residuum derived dominantly from areas are used as nonirrigated cropland. Winter wheat is
sandstone. the main crop.
Typically, the surface layer is light yellowish brown The potential plant community on this unit is mainly
loamy fine sand 7 inches thick. The underlying material blue grama, prairie sandreed, and needleandthread. The
F 0904 'i,,I'l 1tdf! I I IIIf:Fi TI Lrl CLERK . RI::r 'T11..1. WELD CO, CO
Weld County, Colorado, Northern Part 43
average annual production of air-dry vegetation ranges Permeability of this Terry soil is moderately rapid.
from 800 to 2,000 pounds. Available water capacity is moderate. Effective rooting
If the range is overgrazed, the proportion of preferred depth is 20 to 40 inches. Runoff is slow, and the hazard
forage plants decreases and the proportion of less of water erosion is moderate to high. The hazard of soil
preferred forage plants increases. Therefore, livestock blowing is moderate.
grazing should be managed so that the desired balance This unit is used as rangeland.
of preferred species is maintained in the plant The potential plant community on this unit is mainly
community. blue grama, sand dropseed, prairie sandreed, and
Range seeding is suitable if the range is in poor needleandthread. The average annual production of air-
condition. The plants selected for seeding should meet, dry vegetation ranges from 700 to 1,800 pounds.
the seasonal requirements of livestock or wildlife, or . If the range is overgrazed, the proportion of preferred
both. Other management practices that are suitable for forage plants decreases and the proportion of less
use on this unit are proper range use, deferred grazing, preferred forage plants increases. Therefore, livestock
and rotation grazing. If the plant cover is disturbed, grazing should be managed so that the desired balance
protection from soil blowing is needed. Loss of the of preferred species is maintained in the plant
surface layer results in a severe decrease in productivity community.
and in the potential of the soil to produce plants suitable Range seeding is suitable if the range is in poor
condition. The plants selected for seeding should meet
for grazing.
This unit is suited to winter wheat, barley, oats, and the seasonal requirements of livestock or wildlife, or
both. Other management practices that are suitable for
sorghum. Because precipitation is not sufficient for
use on this unit are proper range use, deferred grazing,
annual cropping, a cropping system that includes small and rotation grazing. If the plant cover is disturbed,
grain and summer fallow is most suitable. Precipitation protection from erosion is needed. Loss of the surface
usually is too low for crops on this unit to make efficient layer results in a severe decrease in productivity and in
use of fertilizer. the potential of the soil to produce plants suitable for
Maintaining crop residue on or near the surface grazing.
reduces runoff, reduces soil blowing, and helps to This unit is well suited to windbreaks and
maintain soil tilth and organic matter content. Stubble- environmental plantings. The main limitations are
mulch farming, striperopping, and minimum tillage help to restricted rooting depth and low available water capacity.
control erosion and conserve moisture. Terraces reduce Supplemental irrigation may be needed when planting
runoff and the risk of erosion and help to conserve and during dry periods. Summer fallow, cultivation for
moisture. weed control, and selection of adapted plants are
This unit is well suited to windbreaks and needed to insure establishment and survival of
environmental plantings. The main limitations are seedlings.
restricted rooting depth and low available water capacity. This map unit is in capability subclass Vle,
Supplemental irrigation may be needed when planting nonirrigated, and in Sandy Plains range site.
and during dry periods. Summer fallow, cultivation for
weed control, and selection of adapted plants are 66—Thedalund-Keota foams, 0 to 3 percent slopes.
needed to insure establishment and survival of This map unit is on moderately dissected alluvial fans,
seedlings. upland ridges, and plains.
This map unit is in capability subclass IVe, This unit is about 45 percent Thedalund loam and
nonirrigated, and in Sandy Plains range site. about 35 percent Keota loam. The components of this
unit are so intricately intermingled that it was not
65—Terry sandy loam, 3 to 9 percent slopes. This practical to map them separately at the scale used.
moderately deep, well drained soil is on moderately Included in this unit is about 20 percent Epping silt
dissected to highly dissected plains. It formed in loam, Kim loam, Mitchell silt loam, and Shingle clay
calcareous sandy residuum derived from sandstone. loam. Also included are some areas of Rock outcrop.
Typically, the surface layer is grayish brown sandy Included areas make up about 20 percent of the total
loam 5 inches thick. The subsoil is sandy loam 12 inches acreage.
thick. The substratum is calcareous loamy sand 15 The Thedalund soil is moderately deep and well
inches thick. Sandstone is at a depth of 32 inches. drained. It formed in calcareous loamy residuum derived
Depth to sandstone ranges from 20 to 40 inches. from fine grained sandstone, shale, and siltstone.
Included in this unit are small areas of Olney fine Typically, the surface layer is grayish brown loam 3
sandy loam, Vona sandy loam, and Tassel loamy fine inches thick. Below this is loam 22 inches thick.
sand. Also included are small areas of soils that have a Sandstone is at a depth of 25 inches. Depth to
subsoil of sandy clay loam and have sandy shale at a sandstone, shale, or siltstone ranges from 20 to 40
depth of 20 to 40 inches and soils that have slopes of inches. The soil is calcareous throughout.
less than 3 percent. Included areas make up about 15 Permeability of the Thedalund soil is moderate.
percent of the total acreage. Available water capacity is moderate. Effective rooting
Y3 09;;v PEG 01 0141 06/14/83 1 : 1 )..00 :10/030
F i:raf:ii MARY FINN I'LUEPRs'fli :I'd CLERK x. RII:LOkDER WELD co, c0
44 Soil surve
depth is 20 to 40 inches. Runoff is medium, and the inches thick. Below this is loam 21 inches thick.
hazard of water erosion is slight. The hazard of soil Sandstone is at a depth of 24 inches. Depth to
blowing is moderate. sandstone, shale, or siltstone ranges from 20 to 40
The Keota soil is moderately deep and well drained. It inches. The soil is calcareous throughout.
formed in calcareous loamy residuum derived from Permeability of the Thedalund soil is moderate.
siltstone. Typically, the surface layer is pale brown loam Available water capacity is moderate. Effective rooting
4 inches thick. The next 19 inches is silt loam. Below depth is 20 to 40 inches. Runoff is medium, and the
this is loam 12 inches thick. Siltstone is at a depth of 35 hazard of water erosion is moderate to high. The hazard
inches. Depth to siltstone ranges from 20 to 40 inches. of soil blowing is moderate.
The soil is calcareous throughout. The Keota soil is moderately deep and well drained. It
Permeability of the Keota soil is moderate. Available formed in calcareous loamy residuum derived from
water capacity is moderate. Effective rooting depth is 20 siltstone. Typically, the surface layer is pale brown loam
to 40 inches. Runoff is medium, and the hazard of water 4 inches thick. The next 19 inches is silt loam. Below
erosion is slight to moderate. The hazard of soil blowing this is loam 12 inches thick. Siltstone is at a depth of 35
is moderate. inches. Depth to siltstone ranges from 20 to 40 inches.
This unit is used as rangeland. The soil is calcareous throughout.
The potential plant community on this unit is mainly Permeability of the Keota soil is moderate. Available
blue grama, western wheatgrass, and fourwing saltbush. water capacity is moderate. Effective rooting depth is 20
The average annual production of air-dry vegetation to 40 inches. Runoff is rapid, and the hazard of water
ranges from 500 to 1,500 pounds. erosion is moderate to high. The hazard of soil blowing
If the range is overgrazed, the proportion of preferred is moderate.
forage plants decreases and the proportion of less This unit is used as rangeland.
preferred forage plants increases. Therefore, livestock The potential plant community on this unit is mainly
grazing should be managed so that the desired balance blue grama, western wheatgrass, and fourwing saltbush.
of preferred species is maintained in the plant The average annual production of air-dry vegetation
community. ranges from 400 to 1,300 pounds.
Range seeding is suitable if the range is in poor If the range is overgrazed, the proportion of preferred
condition. The plants selected for seeding should meet forage plants decreases and the proportion of less
the seasonal requirements of livestock or wildlife, or preferred forage plants increases. Therefore, livestock
both. Other management practices that are suitable for grazing should be managed so that the desired balance
use on this unit are proper range use, deferred grazing, of preferred species is maintained in the plant
and rotation grazing. If the plant cover is disturbed, community.
protection from soil blowing is needed. Loss of the Range seeding is suitable if the range is in poor
surface layer results in a severe decrease in productivity condition. The plants selected for seeding should meet
and in the potential of the unit to produce plants suitable the seasonal requirements of livestock or wildlife, or
for grazing. both. Other management practices that are suitable for
This unit is well suited to windbreaks and use on this unit are proper range use, deferred grazing,
environmental plantings. Supplemental irrigation may be and rotation grazing. If the plant cover is disturbed,
needed when planting and during dry periods. protection from erosion is needed. Loss of the surface
This map unit is in capability subclass IVe, layer results in a severe decrease in productivity and in
nonirrigated. The Thedalund soil is in Loamy Plains the potential of the unit to produce plants suitable for
range site, and the Keota soil is in Siltstone Plains range grazing.
site. This unit is well suited to windbreaks and
environmental plantings. Supplemental irrigation may be
67—Thedalund-Keota barns, 3 to 9 percent slopes. needed when planting and during dry periods.
This map unit is on highly dissected alluvial fans, upland This map unit is in capability subclass Vle,
ridges, and plains. honirrigated. The Thedalund soil is in Loamy Plains
This unit is about 45 percent Thedalund loam and r.ange site, and the Keota soil is in Siltstone Plains range
about 35 percent Keota loam. The components of this site.
unit are so intricately intermingled that it was not
practical to map them separately at the scale used. 68—Treon fine sandy loam, 5 to 20 percent slopes.
Included in this unit is about 20 percent Epping silt This shallow, well drained soil is on moderately dissected
loam, Kim loam, Mitchell silt loam, and Shingle clay to highly dissected plains and upland ridges. It formed in
loam. Also included are some areas of Rock outcrop. calcareous loamy residuum derived from fine grained
The Thedalund soil is moderately deep and well sandstone.
drained. It formed in calcareous loamy residuum derived Typically, the surface layer is brown fine sandy loam 7
from fine grained sandstone, shale, and siltstone. inches thick. The underlying material is fine sandy loam
Typically, the surface layer is grayish brown loam 3 4 inches thick. Sandstone is at a depth of 11 inches.
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