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2008-04-25_REVISION - M1992113
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2008-04-25_REVISION - M1992113
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Last modified
6/15/2021 3:01:39 PM
Creation date
4/29/2008 10:21:24 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1992113
IBM Index Class Name
REVISION
Doc Date
4/25/2008
Doc Name
New Amendment Appl
From
Bent County
To
DRMS
Type & Sequence
AM2
Media Type
D
Archive
No
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Site Type: Rangeland Gravel Breaks <br />MLRA: 69 -Upper Arkansas Valley Rolling Plains R069XY064C0 <br />• Prescribed grazing that allows for adequate recovery opportunity following each grazing event and <br />proper stocking will maintain the Sideoats Grama, Little Bluestem, Blue Grama Plant Community <br />(HCPC). <br />Increased Blue Grama with Decreased Mid and Tall Grass Plant Community <br />This plant community developed with continuous grazing without adequate recovery periods during <br />the growing season. The dominant grass is blue grams. Little bluestem and sideoats grams are still <br />present as secondary grasses in the community. Big bluestem, Indiangrass, swritchgrass, prairie <br />sandreed, needleandthread, western wheatgrass, purple prairie clover and winterfat have been <br />significantly reduced. Hairy grams, sand dropseed, red threeawn as well as Hoods phlox, hairy <br />goldaster, western ragweed and slimflower scurfpea have increased. Woody plants include small <br />soapweed and skunkbush sumac. <br />Plant frequency and vigor have decreased. Reduction of tall, mid and rhizomatous grasses, nitrogen- <br />fixing forbs, shrub component and increased warm season short grass has begun to alter the biotic <br />integrity of this community. Water and nutrient cycles are becoming impaired. Litter levels have been <br />reduced. Flow paths and rills are more apparent. Pedestalled plants are comrrion. Desertification is <br />in an early stage. <br />Total annual production, during an average year, ranges from 200 to 700 pounds of air-dry weight and <br />will average 400 pounds. <br />The following is the growth curve of this plant community expected during a normal year: <br />Growth curve number: C06905 <br />Growth curve name: Warm season dominant, cool season sub-dominant; MLR,A-69; upland coarse <br />+cv4~irari cnilc <br /> JANv ~ FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC <br /> 0 0 5 10 22 35 15 10 3 0 0 0 <br />(monthly percentages of total annual growth) <br />Transitions or pathways leading to other plant communities are as follows: <br />• Continuous grazing without adequate recovery opportunities between grazing events will shift this <br />plant community across an ecological threshold toward the Blue Grams Sod, Threadleaf Sedge <br />Plant Community. Weedy species are starting to invade and almost all mid grasses are removed. <br />• Prescribed grazing which allows for adequate recovery periods following each grazing event and <br />proper stocking will move this plant community toward the Little Bluestem, Sideoats Grams, Plant <br />Community (HCPC). <br />Lona-term non-use (rest) and no fire will shift this plant community toward the Bare Ground, <br />Annuals, Cryptogams Plant Community. This transition may take 40 years or more to achieve. <br />!vi ~ (~ Blue Grama Sod Plant Community <br />~ .~O This plant community developed with continued grazing without adequate recovery periods between <br />I V-, grazing events. Blue grams dominates the community and exhibits a mosaic sodbound appearance. <br />Tall grasses have been removed. Little bluestem and sideoats grams may remain in remnant <br />amounts on steeper slopes. Forbs and shrubs that have increased are wormwood, western ragweed, <br />rush skeletonplant, hairy goldaster, fringed sagebrush, small soapweed and broom snakeweed. <br />Cushion plants such as mat loco, Hood's phlox and sessile nailwort have increased. <br />Species diversity and production have been severely reduced. Litter levels are very low. Mineral and <br />water cycles are impaired due to the loss of deeper-rooted grasses, forbs and shrubs. Rills are <br />evident and soil loss is obvious, especially on steeper slopes. Pedestalled plants with exposed roots <br />are common. Desertification is advanced. <br />Technical Guide USDA NRCS <br />Section IIE 7 Rev. 3/04 <br />3 ~-- <br />
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