Ecological site R102DY020SD

3. Native/Invaded State

4. Invaded State

States 1, 5 and 2 (additional transitions)

1.1. Big Bluestem-Indiangrass-Switchgrass

T1A	-	Heavy continuous grazing
T1B	-	Heavy continuous grazing, non-use, no fire, invasion
T1C	-	Tillage
T2A	-	Non-native encroachment/seeding
T2B	-	Tillage
T3A	-	Non-use, no fire, heavy continuous grazing
T3C	-	Tillage
R4A	-	Long-term prescribed grazing, prescribed burning
T4A	-	Tillage
R5A	-	Seeding
R5B	-	Seeding, abandonment of cropping

State 1 submodel, plant communities

1.2. Little Bluestem-Sideoats Grama-Big Bluestem-Forbs

1.1A	-	Heavy continuous grazing
1.2A	-	Prescribed grazing with recovery periods, prescribed burning

State 2 submodel, plant communities

2.1. Sideoats Grama-Little Bluestem-Sedges-Forbs

State 3 submodel, plant communities

3.1. Big Bluestem-Indiangrass-Switchgrass

3.2. Little Bluestem-Kentucky Bluegrass-Big Bluestem

3.1A	-	Heavy continuous grazing
3.2A	-	Prescribed grazing with recovery periods

State 4 submodel, plant communities

4.1. Smooth Bromegrass-Kentucky Bluegrass

4.2. Kentucky Bluegrass-Quackgrass

4.3. Annual Pioneer-Perennial Pioneer

4.1A	-	Heavy continuous grazing
4.2A	-	Prescribed grazing with recovery periods
4.3A	-	Time without disturbances

State 5 submodel, plant communities

5.1. Annual Crops

State 1
Reference State

The Reference State represents the natural range of variability that dominated the dynamics of this ecological site (ES). This state was dominated by warm-season grasses. In pre-European times, the primary disturbance mechanisms for this site in the reference condition included periods of below and/or above average precipitation, periodic fire, and herbivory by insects and large ungulates. Timing of fires and herbivory coupled with weather events dictated the dynamics that occurred within the natural range of variability. In some locations, this site likely received relatively heavy grazing pressure. Tall warm-season grasses would have declined and shorter warm-season grasses would have increased. Today, a similar state, the Native/Invaded State (State 3) can be found on areas that are properly managed with grazing and/or prescribed burning and sometimes on areas receiving occasional short periods of rest.

Dominant plant species

snowberry (Symphoricarpos), shrub
leadplant (Amorpha canescens), shrub
big bluestem (Andropogon gerardii), grass
Indiangrass (Sorghastrum nutans), grass
little bluestem (Schizachyrium scoparium), grass
green needlegrass (Nassella viridula), grass
slender wheatgrass (Elymus trachycaulus), grass
American licorice (Glycyrrhiza lepidota), other herbaceous
Maximilian sunflower (Helianthus maximiliani), other herbaceous
blazing star (Liatris), other herbaceous

Community 1.1
Big Bluestem-Indiangrass-Switchgrass

Interpretations are based primarily on the 1.1 Big Bluestem-Indiangrass-Switchgrass Plant Community Phase (this is also considered to be climax). The potential vegetation was about 80 percent grasses or grass-like plants, 10 percent forbs, and 10 percent shrubs. The community was dominated by warm-season grasses. The major grasses included big bluestem, Indiangrass, and switchgrass. Other grass or grass-like species included porcupine grass (Hesperostipa spartea), green needlegrass (Nassella viridula), slender wheatgrass (Elymus trachycaulus), and little bluestem. This plant community was resilient and well adapted to the Northern Great Plains climatic conditions. The diversity in plant species allowed for high drought tolerance. This was a sustainable plant community in regards to site/soil stability, watershed function, and biologic integrity.

Figure 7. Annual production by plant type (representative values) or group (midpoint values)

Table 5. Annual production by plant type

Plant type	Low (lb/acre)	Representative value (lb/acre)	High (lb/acre)
Grass/Grasslike	3400	3910	4300
Forb	200	345	550
Shrub/Vine	200	345	550
Total	3800	4600	5400

Figure 8. Plant community growth curve (percent production by month). SD0205, Rolling Till Prairie, warm-season dominant.. Warm-season dominant..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	2	5	15	25	30	15	7	1	0	0

Community 1.2
Little Bluestem-Sideoats Grama-Big Bluestem-Forbs

This plant community evolved under heavy continuous grazing or from over utilization during extended drought periods. The potential plant community was made up of approximately 75 percent grasses and grass-like species, 15 percent forbs, and 10 percent shrubs. Dominant grasses included little bluestem, sideoats grama, and big bluestem. Grasses of secondary importance included Indiangrass, switchgrass, green needlegrass, tall dropseed (Sporobolus compositus), and slender wheatgrass. Forbs commonly found in this plant community included Canada goldenrod (Solidago Canadensis), cudweed sagewort (Artemisia ludoviciana), heath aster (Symphyotrichum ericoides), scurfpea (Psoralidium), stiff goldenrod (Oligoneuron rigidum), and western yarrow (Achillea millefolium). This plant community had similar plant composition to the 3.2 Little Bluestem-Kentucky Bluegrass-Big Bluestem Plant Community Phase. The main difference is that this plant community phase did not have the presence of nonnative invasive species such as Kentucky bluegrass and smooth bromegrass. When compared to the 1.1 Big Bluestem-Indiangrass-Switchgrass Plant Community Phase, sideoats grama and little bluestem increased. Production of tall warm-season grasses was reduced. This plant community was moderately resistant to change. The herbaceous species present were well adapted to grazing; however, species composition could be altered through long-term overgrazing. If the herbaceous component was intact, it tended to be resilient if the disturbance was not long-term. Most of the components of the ecological processes would have been functioning at optimum levels. However, the vigor and reproductive capability of the tall warm-season grasses would have been reduced due to grazing pressure or a combination of stressors. A reduction of this dominant functional group allowed for an increase in shorter-statured (and shallower rooted) species.

Figure 9. Plant community growth curve (percent production by month). SD0205, Rolling Till Prairie, warm-season dominant.. Warm-season dominant..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	2	5	15	25	30	15	7	1	0	0

Pathway 1.1A
Community 1.1 to 1.2

Heavy continuous grazing which includes herbivory at moderate to heavy levels at the same time of year each year without adequate recovery periods, or during periods of below normal precipitation when grazing frequency and intensity increases on these sites due to limited forage availability on adjacent upland sites will shift this community to the 1.2 Little Bluestem-Sideoats Grama-Big Bluestem-Forbs Plant Community Phase.

Pathway 1.2A
Community 1.2 to 1.1

Prescribed grazing, and/or prescribed burning returned to normal disturbance regime levels and frequencies or periodic light to moderate grazing possibly including periodic rest will convert this plant community to the 1.1 Big Bluestem-Indiangrass-Switchgrass Plant Community Phase.

State 2
Shortgrass Sod State

This state is the result of heavy continuous grazing, and in the absence of periodic fire due to fire suppression. This state is dominated by blue grama and buffalograss forming a dense sod layer that effectively blocks introduction of other plants into the system. Taller cool-season species will decline and a corresponding increase in short statured grass will occur. Once the threshold is crossed, a change in grazing management alone cannot cause a reduction in the sod grass dominance.

Dominant plant species

snowberry (Symphoricarpos), shrub
leadplant (Amorpha canescens), shrub
rose (Rosa), shrub
blue grama (Bouteloua gracilis), grass
sideoats grama (Bouteloua curtipendula), grass
little bluestem (Schizachyrium scoparium), grass
threadleaf sedge (Carex filifolia), grass
white sagebrush (Artemisia ludoviciana), other herbaceous
goldenrod (Solidago), other herbaceous
western yarrow (Achillea millefolium var. occidentalis), other herbaceous

Community 2.1
Sideoats Grama-Little Bluestem-Sedges-Forbs

This plant community evolved under heavy continuous season grazing or from over utilization during extended drought periods. The potential plant community was made up of approximately 80 percent grasses and grass-like species, 15 percent forbs, and 5 percent shrubs. Dominant grass and grass-like species included sideoats grama, little bluestem, and sedge. Grasses of secondary importance included big bluestem, switchgrass, green needlegrass, slender wheatgrass, and tall dropseed. Forbs commonly found in this plant community included cudweed sagewort, goldenrod (Solidago), and western yarrow. When compared to the 1.1 Big Bluestem-Indiangrass-Switchgrass Plant Community Phase, tall warm-season grasses were reduced, and the more grazing tolerant species such as sideoats grama, little bluestem and sedge were dominant on this plant community. With the exception of green needlegrass, cool-season grasses decreased significantly. This vegetation state was very resistant to change, especially if the disturbance continued and the short-statured species such as sedge increased. The herbaceous species present were well adapted to grazing. This plant community was less productive than other phases.

Figure 10. Plant community growth curve (percent production by month). SD0204, Rolling Till Prairie, warm-season dominant, cool-season subdominant.. Warm-season dominant, cool-season subdominant..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	3	7	17	25	25	15	7	1	0	0

State 3
Native/Invaded State

This state represents the more common range of variability that exists with higher levels of grazing management but in the absence of periodic fire due to fire suppression. This state is dominated by warm-season grasses, with cool-season grasses being subdominant. It can be found on areas that are properly managed with grazing and/or prescribed burning, and sometimes on areas receiving occasional short periods of rest. Taller warm-season species can decline and a corresponding increase in short statured grass will occur.

Dominant plant species

snowberry (Symphoricarpos), shrub
rose (Rosa), shrub
big bluestem (Andropogon gerardii), grass
little bluestem (Schizachyrium scoparium), grass
Kentucky bluegrass (Poa pratensis), grass
smooth brome (Bromus inermis), grass
green needlegrass (Nassella viridula), grass
goldenrod (Solidago), other herbaceous
white heath aster (Symphyotrichum ericoides), other herbaceous
white sagebrush (Artemisia ludoviciana), other herbaceous

Community 3.1
Big Bluestem-Indiangrass-Switchgrass

This plant community phase is similar to the 1.1 Big Bluestem-Indiangrass-Switchgrass Plant Community Phase but it also contains minor amounts of non-native invasive grass species such as Kentucky bluegrass and smooth bromegrass (up to about 10 percent by air-dry weight). The potential vegetation is about 80 percent grasses or grass-like plants, 10 percent forbs, and 10 percent shrubs. This community is dominated by warm-season grasses. The major grasses include big bluestem, Indiangrass, and switchgrass. Other grass or grass-like species include porcupine grass, green needlegrass, slender wheatgrass, and little bluestem. This plant community is resilient and well adapted to the Northern Great Plains climatic conditions. The diversity in plant species allows for high drought tolerance. This is a sustainable plant community in regards to site/soil stability, watershed function, and biologic integrity.

Figure 11. Plant community growth curve (percent production by month). SD0205, Rolling Till Prairie, warm-season dominant.. Warm-season dominant..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	2	5	15	25	30	15	7	1	0	0

Community 3.2
Little Bluestem-Kentucky Bluegrass-Big Bluestem

This plant community is a result of heavy continuous grazing or from over utilization during extended drought periods. The potential plant community is made up of approximately 75 percent grasses and grass-like species, 15 percent forbs, and 10 percent shrubs. Dominant grasses include little bluestem, big bluestem, and Kentucky bluegrass. Grasses of secondary importance include Indiangrass, switchgrass, smooth bromegrass, sideoats grama, green needlegrass, tall dropseed, slender wheatgrass, and sedge. Forbs commonly found in this plant community include cudweed sagewort, heath aster, Canada goldenrod, stiff goldenrod, scurfpea, Indian hemp (Apocynum cannabinum), and western yarrow. When compared to the 1.1 Big Bluestem-Indiangrass-Switchgrass Plant Community Phase, little bluestem has increased and Kentucky bluegrass has invaded and become a codominant. Production of tall warm-season grasses is reduced. This plant community is moderately resistant to change. The herbaceous species present are well adapted to grazing; however, species composition can be altered through long-term overgrazing. If the herbaceous component is intact, it tends to be resilient if the disturbance is not long-term. Most of the components of the ecological processes are functioning at optimum levels. However, the vigor and reproductive capability of the tall warm-season grasses are reduced due to grazing pressure or a combination of stressors. A reduction of this dominant functional group allows for an increase in shorter-statured (and shallower rooted) species. The introduction of nonnative invasive species such as Kentucky bluegrass and smooth bromegrass results in alterations to the soil profile. Organic matter levels tend to decrease and begin to be concentrated more in the surface layers and the structure will begin to be modified. These changes favor the shallow-rooted species and hasten their eventual dominance if steps are not taken to reduce these species.

Figure 12. Annual production by plant type (representative values) or group (midpoint values)

Table 6. Annual production by plant type

Plant type	Low (lb/acre)	Representative value (lb/acre)	High (lb/acre)
Grass/Grasslike	2285	2856	3290
Forb	150	340	610
Shrub/Vine	65	204	400
Total	2500	3400	4300

Figure 13. Plant community growth curve (percent production by month). SD0204, Rolling Till Prairie, warm-season dominant, cool-season subdominant.. Warm-season dominant, cool-season subdominant..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	3	7	17	25	25	15	7	1	0	0

Pathway 3.1A
Community 3.1 to 3.2

Heavy continuous grazing which includes herbivory at moderate to heavy levels at the same time of year each year without adequate recovery periods, or during periods of below normal precipitation when grazing frequency and intensity increases on these sites due to limited forage availability on adjacent upland sites will shift this community to the 3.2 Little Bluestem-Kentucky Bluegrass-Big Bluestem Plant Community Phase.

Pathway 3.2A
Community 3.2 to 3.1

Prescribed grazing (alternating season of use and providing adequate recovery periods) or periodic light to moderate grazing possibly including periodic rest will convert this plant community to the 3.1 Big Bluestem-Indiangrass-Switchgrass Plant Community Phase.

Conservation practices

Prescribed Grazing

State 4
Invaded State

This state is a result of encroachment mainly by invasive introduced cool-season grasses. The ecological processes are not functioning, especially the biotic processes and the hydrologic functions. The introduced cool-season grasses cause reduced infiltration and increased runoff. Preliminary studies would tend to indicate this threshold may exist when Kentucky bluegrass exceeds 30 percent of the plant community and native grasses represent less than 40 percent of the plant community composition. The opportunity for high intensity spring burns is severely reduced by early greenup and increased moisture and humidity at the soil surface and grazing pressure cannot cause a reduction in sodgrass dominance. Production is limited to the sod forming species. Infiltration continues to decrease and runoff increases and energy capture into the system is restricted to early season low producing species. Nutrient cycling is limited by root depth of the dominant species.

Dominant plant species

snowberry (Symphoricarpos), shrub
rose (Rosa), shrub
smooth brome (Bromus inermis), grass
Kentucky bluegrass (Poa pratensis), grass
big bluestem (Andropogon gerardii), grass
switchgrass (Panicum virgatum), grass
threadleaf sedge (Carex filifolia), grass
goldenrod (Solidago), other herbaceous
white heath aster (Symphyotrichum ericoides), other herbaceous
white clover (Trifolium repens), other herbaceous
white sagebrush (Artemisia ludoviciana), other herbaceous

Community 4.1
Smooth Bromegrass-Kentucky Bluegrass

This plant community phase is a result of extended periods of nonuse and no fire or occasionally light levels of grazing over several years. It is characterized by dominance of smooth bromegrass and to a lesser extent Kentucky bluegrass. The dominance is at times so complete that other species are difficult to find on the site. A thick duff layer also accumulates at or above the soil surface and eventually a thatch-mat layer may develop at the surface. Nutrient cycling is greatly reduced and native plants have great difficulty becoming established. When dominated by smooth bromegrass, infiltration is moderately reduced and runoff is moderate. Production can be equal to or higher than the interpretive plant community. However, when dominated by Kentucky bluegrass, infiltration is greatly reduced and runoff is high. Production in this case will likely be significantly less. In either case, the period that palatability is high is relatively short as these cool-season species mature rapidly. Energy capture is also reduced. The dominance of these introduced species has been shown to alter the biotic component of the soil, as well as, organic matter levels and eventually the soil structure. These alterations perpetuate the dominance of Kentucky bluegrass and smooth bromegrass and tend to make establishment of native species extremely difficult.

Figure 14. Annual production by plant type (representative values) or group (midpoint values)

Table 7. Annual production by plant type

Plant type	Low (lb/acre)	Representative value (lb/acre)	High (lb/acre)
Grass/Grasslike	2750	3460	4050
Forb	175	300	475
Shrub/Vine	75	240	475
Total	3000	4000	5000

Figure 15. Plant community growth curve (percent production by month). SD0201, Rolling Till Prairie, cool-season dominant.. Cool-season dominant..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	4	12	25	36	10	5	4	4	0	0

Community 4.2
Kentucky Bluegrass-Quackgrass

This plant community phase is a result of heavy, continuous seasonal grazing or heavy, continuous season-long grazing. It is characterized by a dominance of Kentucky bluegrass and quackgrass. The dominance is at times so complete that other species are difficult to find on the site. A relatively thick duff layer can sometimes accumulate at or above the soil surface and a thatch-mat layer often develops at the surface. Nutrient cycling is greatly reduced and native plants have great difficulty becoming established. Infiltration is greatly reduced and runoff is high. Production will be significantly reduced when compared to the interpretive plant community. The period that palatability is high is relatively short as Kentucky bluegrass matures rapidly. Energy capture is also reduced. Biological activity in the soil is likely reduced significantly in this phase.

Figure 16. Annual production by plant type (representative values) or group (midpoint values)

Table 8. Annual production by plant type

Plant type	Low (lb/acre)	Representative value (lb/acre)	High (lb/acre)
Grass/Grasslike	1660	2249	2765
Forb	115	260	460
Shrub/Vine	25	91	175
Total	1800	2600	3400

Figure 17. Plant community growth curve (percent production by month). SD0201, Rolling Till Prairie, cool-season dominant.. Cool-season dominant..

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
J	F	M	A	M	J	J	A	S	O	N	D
0	0	4	12	25	36	10	5	4	4	0	0

Community 4.3
Annual Pioneer-Perennial Pioneer

This plant community developed under continuous heavy grazing or other excessive disturbances. The potential plant community is made up of approximately 40 to 80 percent grasses and grass-like species, 20 to 60 percent forbs, and 0 to 5 percent shrubs. The species present in this phase are highly variable but often include non-native invasive and/or early seral species. Plant diversity is low (plant richness may be high, but areas are often dominated by a few species). The ecological processes are difficult to restore because of the loss of plant diversity and overall soil disturbance. Soil erosion is potentially very high because of the bare ground and shallow rooted herbaceous plant community. Water runoff will increase and infiltration will decrease due to animal related soil compaction and loss of root mass due to low plant diversity and vigor. This plant community will require significant economic inputs and time to move towards another plant community. This movement is highly variable in its succession. This is due to the loss of diversity (including the loss of the seed bank), within the existing plant community, and the plant communities on adjacent sites. This community can be renovated to improve the production capability; however, if management changes are not made the vegetation could revert back to early seral species.

Pathway 4.1A
Community 4.1 to 4.2

Heavy continuous grazing which includes herbivory at moderate to heavy levels at the same time of year each year without adequate recovery periods, or during periods of below normal precipitation when grazing frequency and intensity increases on these sites due to limited forage availability on adjacent upland sites will shift this community to the 4.2 Kentucky Bluegrass-Quackgrass Plant Community Phase.

Pathway 4.2A
Community 4.2 to 4.1

Prescribed grazing (alternating season of use and providing adequate recovery periods) or periodic light to moderate grazing possibly including periodic rest will convert this plant community to the 4.1 Smooth Bromegrass-Kentucky Bluegrass Plant Community Phase.

Conservation practices

Prescribed Grazing

Pathway 4.3A
Community 4.3 to 4.2

This community pathway occurs with the passage of time as successional processes take place and perennial plants gradually begin to establish on the site again. This pathway will lead to the 4.2 Kentucky Bluegrass-Quackgrass Plant Community Phase.

State 5
Crop Production State

This state is characterized by the production of annual crops using a variety of tillage and cropping systems along with management practices. Cropping on this site is enabled during years with drier than normal precipitation or with artificial drainage (surface or subsurface).

Dominant plant species

corn (Zea), grass
wheat (Triticum), grass
soybean (Glycine), other herbaceous

Community 5.1
Annual Crops

This plant community developed with the use of a variety of tillage systems and cropping systems for the production of annual crops including corn, soybeans, wheat, sugar beet and a variety of other crops.

Transition T1A
State 1 to 2

Heavy continuous grazing (stocking levels well above carrying capacity for extended portions of the growing season, and often at the same time of year each year, typically beginning early in the season) will convert this plant community to the 2.1 Sideoats Grama-Little Bluestem-Sedges-Forbes Plant Community Phase within the Shortgrass Sod State.

Transition T1B
State 1 to 3

Non-use and/or no surface fire for extended periods of time (typically for 10 or more years) causing litter levels to become high enough to reduce native grass vigor, diversity, and density, and/or heavy continuous grazing or invasion of non-native plant species will likely lead this state over a threshold resulting in the Native/Invaded State (State 3).

Transition T1C
State 1 to 5

Tillage will cause a shift over a threshold leading to the 5.1 Annual Crops within the Crop Production State (State 5).

Transition T2A
State 2 to 4

Encroachment of non-native invasive/noxious species, abandonment of cropping, or seeding of introduced and/or native improved varieties of forage species may lead this plant community phase over a threshold to the Invaded State (State 4) and more specifically to the 4.3 Annual/Pioneer, Non-native Perennial Plant Community Phase. In the case of a seeding, refer to the corresponding Forage Suitability Group (FSG) description for adapted species and expected production (production estimates in the FSG description may be unrealistically high due to the degraded condition of the site at this phase).

Transition T2B
State 2 to 5

Tillage will cause a shift over a threshold leading to the 5.1 Annual Crops within the Crop Production State (State 5).

Transition T3A
State 3 to 4

Non-use and/or no surface fire for extended periods of time (typically for 10 or more years) causing litter levels to become high enough to reduce native grass vigor, diversity, and density, will likely lead this state over a threshold leading to the 4.1 Smooth Bromegrass-Kentucky Bluegrass Community Phase within the Invaded State (State 4). Heavy continuous grazing (stocking levels well above carrying capacity for extended portions of the growing season and often at the same time of year each year), will likely lead this state over a threshold leading to the 4.2 Kentucky Bluegrass-Quackgrass Community Phase within the Invaded State (State 4). Grazing repeatedly in the early growing season can expedite this shift by causing mechanical disturbance due to trampling.

Transition T3C
State 3 to 5

Tillage will cause a shift over a threshold leading to the 5.1 Annual Crops within the Crop Production State (State 5).

Restoration pathway R4A
State 4 to 3

Long-term prescribed grazing (moderate stocking levels coupled with adequate recovery periods, or other grazing systems such as high-density, low-frequency intended to treat specific species dominance, or periodic light to moderate stocking levels possibly including periodic rest) coupled with prescribed burning may lead this plant community phase over a threshold to the Native/Invaded State (State 3).

Conservation practices

Prescribed Grazing
Integrated Pest Management (IPM)

Transition T4A
State 4 to 5

Tillage will cause a shift over a threshold leading to the 5.1 Annual Crops Community Phase within the Crop Production State (State 5).

Restoration pathway R5A
State 5 to 3

Seeding may lead this Crop Production State (State 5) over a threshold to the Native/Invaded State (State 3).

Restoration pathway R5B
State 5 to 4

Seeding may lead this Crop Production State (State 5) over a threshold to the Invaded State (State 4). Cropping followed by abandonment may lead this plant community phase over a threshold to the Invaded State (State 4) and more specifically to the 4.3 Annual Pioneer-Perennial Pioneer Plant Community Phase.

Additional community tables

Table 9. Community 1.1 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (lb/acre)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-season Grasses			690–2300
	big bluestem	ANGE	Andropogon gerardii	690–2300	–
	Indiangrass	SONU2	Sorghastrum nutans	460–1380	–
	switchgrass	PAVI2	Panicum virgatum	230–690	–
	spiked muhly	MUGL3	Muhlenbergia glomerata	0–230	–
	composite dropseed	SPCOC2	Sporobolus compositus var. compositus	0–138	–
2	Mid Warm-season Grasses			230–460
	little bluestem	SCSC	Schizachyrium scoparium	92–460	–
	sideoats grama	BOCU	Bouteloua curtipendula	46–230	–
	prairie dropseed	SPHE	Sporobolus heterolepis	0–138	–
3	Cool-season Bunchgrasses			230–460
	green needlegrass	NAVI4	Nassella viridula	92–460	–
	Canada wildrye	ELCA4	Elymus canadensis	46–230	–
	porcupinegrass	HESP11	Hesperostipa spartea	0–138	–
4	Wheatgrass			92–460
	slender wheatgrass	ELTR7	Elymus trachycaulus	92–460	–
	western wheatgrass	PASM	Pascopyrum smithii	0–230	–
5	Other Native Grasses			92–230
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	46–230	–
	prairie Junegrass	KOMA	Koeleria macrantha	46–92	–
	Scribner's rosette grass	DIOLS	Dichanthelium oligosanthes var. scribnerianum	0–46	–
6	Grass-likes			46–230
	sedge	CAREX	Carex	46–230	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–92	–
Forb
7	Forbs			230–460
	Forb, native	2FN	Forb, native	46–138	–
	American licorice	GLLE3	Glycyrrhiza lepidota	0–138	–
	Maximilian sunflower	HEMA2	Helianthus maximiliani	46–138	–
	blazing star	LIATR	Liatris	46–92	–
	western yarrow	ACMIO	Achillea millefolium var. occidentalis	46–92	–
	purple prairie clover	DAPU5	Dalea purpurea	46–92	–
	Indianhemp	APCA	Apocynum cannabinum	0–92	–
	white sagebrush	ARLU	Artemisia ludoviciana	46–92	–
	wavyleaf thistle	CIUN	Cirsium undulatum	46–92	–
	goldenrod	SOLID	Solidago	46–92	–
	white heath aster	SYER	Symphyotrichum ericoides	46–92	–
	American vetch	VIAM	Vicia americana	46–92	–
	cinquefoil	POTEN	Potentilla	46–92	–
	scurfpea	PSORA2	Psoralidium	46–92	–
	upright prairie coneflower	RACO3	Ratibida columnifera	46–92	–
	ragwort	SENEC	Senecio	0–46	–
	golden tickseed	COTI3	Coreopsis tinctoria	0–46	–
	Illinois bundleflower	DEIL	Desmanthus illinoensis	0–46	–
	northern bedstraw	GABO2	Galium boreale	0–46	–
	Canadian anemone	ANCA8	Anemone canadensis	0–46	–
	wood lily	LIPH	Lilium philadelphicum	0–46	–
Shrub/Vine
8	Shrubs			230–460
	snowberry	SYMPH	Symphoricarpos	46–184	–
	leadplant	AMCA6	Amorpha canescens	46–184	–
	false indigo bush	AMFR	Amorpha fruticosa	0–92	–
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–92	–
	American plum	PRAM	Prunus americana	0–92	–
	chokecherry	PRVI	Prunus virginiana	0–92	–
	currant	RIBES	Ribes	0–92	–
	rose	ROSA5	Rosa	46–92	–

Table 10. Community 3.2 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (lb/acre)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-season Grasses			170–850
	big bluestem	ANGE	Andropogon gerardii	170–680	–
	switchgrass	PAVI2	Panicum virgatum	170–340	–
	Indiangrass	SONU2	Sorghastrum nutans	0–340	–
	composite dropseed	SPCOC2	Sporobolus compositus var. compositus	0–170	–
2	Mid Warm-season Grasses			340–850
	little bluestem	SCSC	Schizachyrium scoparium	340–850	–
	sideoats grama	BOCU	Bouteloua curtipendula	68–272	–
3	Cool-season Bunchgrasses			34–340
	green needlegrass	NAVI4	Nassella viridula	34–340	–
	Canada wildrye	ELCA4	Elymus canadensis	0–68	–
	porcupinegrass	HESP11	Hesperostipa spartea	0–68	–
4	Wheatgrass			0–170
	slender wheatgrass	ELTR7	Elymus trachycaulus	0–170	–
	western wheatgrass	PASM	Pascopyrum smithii	0–102	–
5	Other Native Grasses			34–170
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–170	–
	prairie Junegrass	KOMA	Koeleria macrantha	0–68	–
	Scribner's rosette grass	DIOLS	Dichanthelium oligosanthes var. scribnerianum	0–34	–
6	Grass-likes			34–170
	sedge	CAREX	Carex	34–170	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–68	–
7	Non-Native Grasses			340–850
	Kentucky bluegrass	POPR	Poa pratensis	170–680	–
	smooth brome	BRIN2	Bromus inermis	68–340	–
	quackgrass	ELRE4	Elymus repens	0–170	–
Forb
8	Forbs			170–510
	goldenrod	SOLID	Solidago	34–170	–
	white heath aster	SYER	Symphyotrichum ericoides	34–136	–
	Forb, introduced	2FI	Forb, introduced	34–136	–
	white sagebrush	ARLU	Artemisia ludoviciana	34–136	–
	Forb, native	2FN	Forb, native	0–102	–
	western yarrow	ACMIO	Achillea millefolium var. occidentalis	34–102	–
	Indianhemp	APCA	Apocynum cannabinum	0–102	–
	American licorice	GLLE3	Glycyrrhiza lepidota	0–102	–
	scurfpea	PSORA2	Psoralidium	34–102	–
	upright prairie coneflower	RACO3	Ratibida columnifera	0–68	–
	blazing star	LIATR	Liatris	0–68	–
	cinquefoil	POTEN	Potentilla	0–68	–
	common dandelion	TAOF	Taraxacum officinale	0–68	–
	white clover	TRRE3	Trifolium repens	0–68	–
	Canada thistle	CIAR4	Cirsium arvense	0–68	–
	wavyleaf thistle	CIUN	Cirsium undulatum	0–34	–
	purple prairie clover	DAPU5	Dalea purpurea	0–34	–
	American vetch	VIAM	Vicia americana	0–34	–
	Maximilian sunflower	HEMA2	Helianthus maximiliani	0–34	–
	ragwort	SENEC	Senecio	0–34	–
Shrub/Vine
9	Shrubs			68–340
	snowberry	SYMPH	Symphoricarpos	34–272	–
	rose	ROSA5	Rosa	34–102	–
	false indigo bush	AMFR	Amorpha fruticosa	0–102	–
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–68	–
	leadplant	AMCA6	Amorpha canescens	0–34	–
	American plum	PRAM	Prunus americana	0–34	–
	chokecherry	PRVI	Prunus virginiana	0–34	–

Table 11. Community 4.1 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (lb/acre)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-season Grasses			0–400
	big bluestem	ANGE	Andropogon gerardii	0–320	–
	switchgrass	PAVI2	Panicum virgatum	0–320	–
	composite dropseed	SPCOC2	Sporobolus compositus var. compositus	0–170	–
	Indiangrass	SONU2	Sorghastrum nutans	0–80	–
2	Mid Warm-season Grasses			0–200
	sideoats grama	BOCU	Bouteloua curtipendula	0–200	–
	little bluestem	SCSC	Schizachyrium scoparium	0–200	–
3	Cool-season Bunchgrasses			0–320
	green needlegrass	NAVI4	Nassella viridula	0–320	–
4	Wheatgrass			0–200
	slender wheatgrass	ELTR7	Elymus trachycaulus	0–200	–
	western wheatgrass	PASM	Pascopyrum smithii	0–80	–
5	Other Native Grasses			0–200
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–160	–
	Scribner's rosette grass	DIOLS	Dichanthelium oligosanthes var. scribnerianum	0–40	–
	prairie Junegrass	KOMA	Koeleria macrantha	0–40	–
6	Grass-likes			0–200
	sedge	CAREX	Carex	0–200	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–40	–
7	Non-Native Grasses			1200–2800
	smooth brome	BRIN2	Bromus inermis	800–2400	–
	Kentucky bluegrass	POPR	Poa pratensis	400–1400	–
	quackgrass	ELRE4	Elymus repens	0–320	–
Forb
8	Forbs			200–400
	goldenrod	SOLID	Solidago	40–120	–
	white heath aster	SYER	Symphyotrichum ericoides	40–120	–
	white clover	TRRE3	Trifolium repens	0–120	–
	Forb, introduced	2FI	Forb, introduced	40–120	–
	white sagebrush	ARLU	Artemisia ludoviciana	40–120	–
	Canada thistle	CIAR4	Cirsium arvense	0–120	–
	American licorice	GLLE3	Glycyrrhiza lepidota	0–80	–
	Forb, native	2FN	Forb, native	0–80	–
	western yarrow	ACMIO	Achillea millefolium var. occidentalis	40–80	–
	Indianhemp	APCA	Apocynum cannabinum	0–80	–
	scurfpea	PSORA2	Psoralidium	40–80	–
	common dandelion	TAOF	Taraxacum officinale	0–80	–
	cinquefoil	POTEN	Potentilla	0–40	–
Shrub/Vine
9	Shrubs			80–400
	snowberry	SYMPH	Symphoricarpos	40–320	–
	rose	ROSA5	Rosa	40–120	–
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–80	–
	false indigo bush	AMFR	Amorpha fruticosa	0–80	–
	American plum	PRAM	Prunus americana	0–80	–

Table 12. Community 4.2 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (lb/acre)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-season Grasses			0–130
	switchgrass	PAVI2	Panicum virgatum	0–78	–
	composite dropseed	SPCOC2	Sporobolus compositus var. compositus	0–78	–
2	Mid Warm-season Grasses			0–78
	sideoats grama	BOCU	Bouteloua curtipendula	0–78	–
	little bluestem	SCSC	Schizachyrium scoparium	0–78	–
3	Cool-season Bunchgrasses			0–130
	green needlegrass	NAVI4	Nassella viridula	0–130	–
4	Wheatgrass			0–130
	western wheatgrass	PASM	Pascopyrum smithii	0–104	–
	slender wheatgrass	ELTR7	Elymus trachycaulus	0–52	–
5	Other Native Grasses			0–78
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–78	–
	Scribner's rosette grass	DIOLS	Dichanthelium oligosanthes var. scribnerianum	0–26	–
	prairie Junegrass	KOMA	Koeleria macrantha	0–26	–
6	Grass-likes			26–208
	sedge	CAREX	Carex	26–208	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–52	–
7	Non-Native Grasses			910–1950
	Kentucky bluegrass	POPR	Poa pratensis	650–1690	–
	quackgrass	ELRE4	Elymus repens	130–520	–
	smooth brome	BRIN2	Bromus inermis	0–390	–
Forb
8	Forbs			130–390
	Canada thistle	CIAR4	Cirsium arvense	26–208	–
	Forb, introduced	2FI	Forb, introduced	26–182	–
	white clover	TRRE3	Trifolium repens	0–156	–
	common dandelion	TAOF	Taraxacum officinale	0–130	–
	goldenrod	SOLID	Solidago	26–104	–
	western yarrow	ACMIO	Achillea millefolium var. occidentalis	26–104	–
	white sagebrush	ARLU	Artemisia ludoviciana	26–78	–
	scurfpea	PSORA2	Psoralidium	26–78	–
	white heath aster	SYER	Symphyotrichum ericoides	26–78	–
	American licorice	GLLE3	Glycyrrhiza lepidota	0–52	–
	cinquefoil	POTEN	Potentilla	0–26	–
	Indianhemp	APCA	Apocynum cannabinum	0–26	–
	Forb, native	2FN	Forb, native	0–26	–
Shrub/Vine
9	Shrubs			26–156
	snowberry	SYMPH	Symphoricarpos	26–130	–
	rose	ROSA5	Rosa	0–52	–
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–26	–
	American plum	PRAM	Prunus americana	0–26	–

Interpretations

Animal community

Animal Community – Grazing Interpretations The following table lists annual, suggested initial stocking rates with average growing conditions. These are conservative estimates that should be used only as guidelines in the initial stages of conservation planning. Often, the current plant composition does not entirely match any particular plant community (as described in this ES description). Because of this a resource inventory is necessary to document plant composition and production. More accurate carrying capacity estimates should eventually be calculated using the following stocking rate information along with animal preference data and actual stocking records, particularly when grazers other than cattle are involved. With consultation of the land manager, more intensive grazing management may result in improved harvest efficiencies and increased carrying capacity.

Big Bluestem/Indiangrass/Switchgrass (1.1 & 3.1)
Average Annual Production (lbs./acre, air-dry): 4600
Stocking Rate* (AUM/acre): 1.26

Little Bluestem/Kentucky Bluegrass/Big Bluestem (3.2)
Average Annual Production (lbs./acre, air-dry): 3400
Stocking Rate* (AUM/acre): 0.93

Smooth Bromegrass/Kentucky Bluegrass (4.1)
Average Annual Production (lbs./acre, air-dry): 4000
Stocking Rate* (AUM/acre): 1.10

Kentucky Bluegrass/Quackgrass (4.2)
Average Annual Production (lbs./acre, air-dry): 2600
Stocking Rate* (AUM/acre): 0.71

Annual/Pioneer, Non-Native Perennial (4.3)
Average Annual Production (lbs./acre, air-dry): 1200
Stocking Rate* (AUM/acre): 0.33

*Based on 912 lbs./acre (air-dry weight) per Animal Unit Month (AUM), and on 25 percent harvest efficiency (refer to United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS), National Range and Pasture Handbook).

Grazing by domestic livestock is one of the major income-producing industries in the area. Rangeland in this area may provide yearlong forage. During the dormant period, the forage for livestock will likely be lacking protein to meet livestock requirements, and added protein will allow ruminants to better utilize the energy stored in grazed plant materials. A forage quality test (either directly or through fecal sampling) should be used to determine the level of supplementation needed.

Hydrological functions

Water is the principal factor limiting forage production on this site. This site is dominated by soils in hydrologic group B. Infiltration is typically moderate to moderately high and runoff potential for this site varies from low to medium depending on soil hydrologic group, slope, and ground cover. In many cases, areas with greater than 75 percent ground cover have the greatest potential for high infiltration and lower runoff. An example of an exception would be where shortgrasses form a strong sod and dominate the site. Dominance by Kentucky bluegrass and/or smooth bromegrass will result in reduced infiltration and increased runoff. Areas where ground cover is less than 50 percent have the greatest potential to have reduced infiltration and higher runoff (refer to Section 4, NRCS National Engineering Handbook for runoff quantities and hydrologic curves).

Recreational uses

This site provides hunting, hiking, photography, bird watching, and other opportunities. The wide varieties of plants that bloom from spring until fall have an esthetic value that appeals to visitors.

Wood products

No appreciable wood products are typically present on this site.

Other products

Seed harvest of native plant species can provide additional income on this site.

Supporting information

Inventory data references

MLRA 102D was created in 2022 with Agricultural Handbook 296 updated. This area was MLRA 102A prior to this time. Information was copied from MLRA 102A ESDs to create the MLRA 102D ESDs.

Information presented here has been derived from NRCS clipping data and other inventory data. Field observations from range-trained personnel were also used. Those involved in developing this site include: Stan Boltz, Range Management Specialist, NRCS; and Bruce Kunze, Soil Scientist, NRCS.

Data Source Sample Period State County
NP-ESC-1 (0100746039) 2007 SD Deuel

Other references

Cleland, D.T., J.A. Freeouf, J.E. Keys, G.J. Nowacki, C. Carpenter, and W.H. McNab. 2007. Ecological Subregions: Sections and Subsections of the Coterminous United States. USDA Forest Service, General Technical Report WO-76. Washington, DC. 92 pps.

Gilbert, M. C., Whited, P. M., Clairain Jr, E. J., & Smith, R. D. (2006). A Regional Guidebook for Applying the Hydrogeomorphic Approach to Assessing Wetland Functions of Prairie Potholes. Washington DC.

Samson, F. B., & Knopf, F. L. (1996). Prairie Conservation Preserving North America's Most Endagered Ecosystem. Washington D.C.: Island Press.

Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Official Soil Series Descriptions. Available online. Accessed March 2018.

United States Department of Agriculture – Natural Resource Conservation Service (USDA-NRCS). 2003. National Range and Pasture Handbook, Revision 1. Grazing Lands Technology Institute. 214 pps.

United States Department of Agriculture – Natural Resource Conservation Service (USDA-NRCS). 2006. Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. 672pps.

United States Department of Agriculture, Natural Resources Conservation Service. 2022. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture, Agriculture Handbook 296.

USDA, NRCS. National Soil Information System, Information Technology Center, 2150 Centre Avenue, Building A, Fort Collins, CO 80526. (http://soils.usda.gov/technical/nasis/)

USDA, NRCS. 2018. The PLANTS Database (http://plants.usda.gov, 27 March 2018). National Plant Data Team, Greensboro, NC 27401-4901 USA.

U.S. Environmental Protection Agency [EPA]. 2013. Level III and Level IV Ecoregions of the Continental United States. Corvallis, OR, U.S. EPA, National Health and Environmental Effects Research Laboratory, map scale 1:3,000,000. Available at http://www.epa.gov/eco-research/level-iii-and-iv-ecoregions- continental-united-states. (Accessed 1 March 2018).

Contributors

Megan Baxter
Stan Boltz
Lance Howe
Steve Winter

Approval

Suzanne Mayne-Kinney, 8/14/2024

Acknowledgments

Contact for Lead Authors: Natural Resources Conservation Service (USDA-NRCS), Redfield Soil Survey Office Redfield, SD; Lance Howe (Lance.Howe@usda.gov), Soil Survey Office Leader, USDA-NRCS, Redfield, SD; and Steve Winter (Steven.Winter@usda.gov), Soil Scientist, USDA-NRCS, Redfield, SD

Additional Information Acknowledgment: Jason Hermann (Jason.Hermann@usda.gov), Area Rangeland Management Specialist, USDA-NRCS, Redfield, SD.

Rangeland health reference sheet

Interpreting Indicators of Rangeland Health is a qualitative assessment protocol used to determine ecosystem condition based on benchmark characteristics described in the Reference Sheet. A suite of 17 (or more) indicators are typically considered in an assessment. The ecological site(s) representative of an assessment location must be known prior to applying the protocol and must be verified based on soils and climate. Current plant community cannot be used to identify the ecological site.

Author(s)/participant(s)	David Schmidt, Tim Nordquist, Stan Boltz
Contact for lead author
Date	12/04/2007
Approved by	Suzanne Mayne-Kinney
Approval date
Composition (Indicators 10 and 12) based on	Annual Production

Indicators

Number and extent of rills:
Rills should not be present.
Presence of water flow patterns:
Barely observable.
Number and height of erosional pedestals or terracettes:
Essentially, non-existent.
Bare ground from Ecological Site Description or other studies (rock, litter, lichen, moss, plant canopy are not bare ground):
Bare ground less than 5% and less than 2 inches in diameter.
Number of gullies and erosion associated with gullies:
Active gullies should not be present.
Extent of wind scoured, blowouts and/or depositional areas:
None.
Amount of litter movement (describe size and distance expected to travel):
Little to no plant litter movement. Plant litter remains in place and is not moved by erosional forces.
Soil surface (top few mm) resistance to erosion (stability values are averages - most sites will show a range of values):
Stability class usually 6. Typically high root content, organic matter, and granular structure. Soil surface is very resistant to erosion.
Soil surface structure and SOM content (include type of structure and A-horizon color and thickness):
Use soil series description for depth and color of A-horizon.
Effect of community phase composition (relative proportion of different functional groups) and spatial distribution on infiltration and runoff:
Healthy, deep rooted native grasses enhance infiltration and reduce runoff.
Presence and thickness of compaction layer (usually none; describe soil profile features which may be mistaken for compaction on this site):
No compaction layer should be evident.
Functional/Structural Groups (list in order of descending dominance by above-ground annual-production or live foliar cover using symbols: >>, >, = to indicate much greater than, greater than, and equal to):

Dominant:
Tall warm-season rhizomatous grass >> tall cool-season bunch grass

Sub-dominant:
> mid warm-season bunch grass > short cool-season grass = forb > shrub > tree

Other:

Additional:
Amount of plant mortality and decadence (include which functional groups are expected to show mortality or decadence):
Very little to no evidence of decadence or mortality.
Average percent litter cover (%) and depth ( in):
85-90%, roughly 0.5 inch thick or less. Litter cover is in contact with soil surface.
Expected annual annual-production (this is TOTAL above-ground annual-production, not just forage annual-production):
4000 – 5200 lbs./acre air-dry weight, average 4,600 lbs./acre air-dry weight
Potential invasive (including noxious) species (native and non-native). List species which BOTH characterize degraded states and have the potential to become a dominant or co-dominant species on the ecological site if their future establishment and growth is not actively controlled by management interventions. Species that become dominant for only one to several years (e.g., short-term response to drought or wildfire) are not invasive plants. Note that unlike other indicators, we are describing what is NOT expected in the reference state for the ecological site:
Refer to State and Local Noxious Weed List, also Kentucky bluegrass, smooth bromegrass
Perennial plant reproductive capability:
All species are capable of reproducing.

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Ecosystem states

3. Native/Invaded State

4. Invaded State

States 1, 5 and 2 (additional transitions)