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Ecological site R102DY002SD

Linear Meadow

Last updated: 8/14/2024
Accessed: 11/21/2024

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General information

Provisional. A provisional ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model and enough information to identify the ecological site.

MLRA notes

Major Land Resource Area (MLRA): 102D–Prairie Coteau

This area makes up about 7,867 square miles (20,375 square kilometers), consisting mostly of nearly level to undulating till plains with potholes and moraines. Elevation ranges from 1,150 to 2,130 feet (350 to 650 meters). The average annual precipitation is 22 to 29 inches (559 to 734 millimeters). The average annual temperature is 42 to 45 degrees F (6 to 7 degrees C). The dominant soil order in this MLRA is Mollisols. The soils in this area dominantly have a frigid temperature regime, and an aquic or udic moisture regime. They are generally very deep and loamy. Soils range from well drained to very poorly drained. Parent materials are dominantly fine-loamy till to clayey material, with smaller amounts of outwash, glaciofluvial deposits, eolian deposits, alluvium, and, to a lesser extent, loess and organic materials.

Classification relationships

*Fenneman (1916) Physiographic Regions*
Division - Interior Plains
East:
Province - Central Lowland
Section - Western Lake / Dissected Till Plains (12b/12e)

*USFS (2007) Ecoregions*
Domain - Humid Temperate
Division - Prairie
Province - Prairie Parkland (Temperate)
Section - North-Central Glaciated Plains (251B)

*EPA Ecoregions (Omernik 1997)*
I - Great Plains (9)
II - Temperate Prairies (9.2)
III - Aspen Parkland/Northern Glaciated Plains (9.2.1)

Ecological site concept

The Linear Meadow ecological site typically occurs in drainageways which can receive excessive run off moisture from within the watershed. Soils are formed in local alluvium and are poorly and very poorly drained, which have a water table within 0 to 1.5 feet (0 to 0.45 meters) of the soil surface that persists longer than the wettest part of the growing season typically until the month of August. Vegetation in the Reference State is typically codominated by cool-season grass and grass-like species and warm season grasses including prairie cordgrass, reedgrasses, and a variety of sedges and rushes. Forbs include broadfruit bur-reed, giant goldenrod, Maximilian sunflower, and asters. Non-native species such as reed canarygrass may invade the site due to change in disturbance regime.

Associated sites

R102DY001SD	Shallow Marsh These sites occur in a basin or closed depression. Soils are very poorly drained and the site will pond water until early summer in most years.
R102DY003SD	Subirrigated These sites occur in drainageways. Soils are somewhat poorly drained which have a water table within 2 to 5 feet (0.6 to 1.5 meters) of the soil surface that persists longer than the wettest part of the growing season typically until the month of August.
R102DY004SD	Wet Meadow These sites occur in a basin or closed depression. Soils are poorly drained and the site ponds water for 4 to 8 weeks in the spring of the year or after a heavy rain.
R102DY020SD	Loamy Overflow These sites occur in upland swales. Soils are moderately well drained which have water flow into and over/through the site.

Similar sites

R102DY001SD	Shallow Marsh The Shallow Marsh site occurs in a basin or closed depression. Soils are very poorly drained and the site will pond water until early summer in most years. A Shallow Marsh site will have less prairie cordgrass and higher production than a Linear Meadow.

R102DY001SD

Shallow Marsh

The Shallow Marsh site occurs in a basin or closed depression. Soils are very poorly drained and the site will pond water until early summer in most years. A Shallow Marsh site will have less prairie cordgrass and higher production than a Linear Meadow.

Table 1. Dominant plant species

Tree	Not specified
Shrub	Not specified
Herbaceous	(1) Spartina pectinata (2) Calamagrostis stricta ssp. inexpansa

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Physiographic features

This site occurs on nearly level flood plains or drainageways.

Table 2. Representative physiographic features

Landforms	(1) Flood plain (2) Drainageway
Runoff class	Low
Flooding duration	Long (7 to 30 days)
Flooding frequency	None to frequent
Ponding frequency	None
Elevation	950 – 2,100 ft
Slope	2%
Water table depth	18 in
Aspect	Aspect is not a significant factor

Climatic features

The average annual precipitation is 22 to 28 inches. Half or more of the precipitation falls during the growing season. Rainfall typically occurs during high-intensity, convective thunderstorms in summer. In the western part of the MLRA, rainfall is less abundant and not always adequate for full maturation of crops. Precipitation in winter is typically snow. The average annual temperature is 42 to 45 degrees F. The freeze-free period averages 142 days and ranges from 131 to 150 days.

Table 3. Representative climatic features

Frost-free period (characteristic range)	115-130 days
Freeze-free period (characteristic range)	136-147 days
Precipitation total (characteristic range)	23-27 in
Frost-free period (actual range)	110-131 days
Freeze-free period (actual range)	130-150 days
Precipitation total (actual range)	22-28 in
Frost-free period (average)	122 days
Freeze-free period (average)	142 days
Precipitation total (average)	25 in

Characteristic range

Actual range

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Figure 1. Monthly precipitation range

Characteristic range

Actual range

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Figure 2. Monthly minimum temperature range

Characteristic range

Actual range

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Figure 3. Monthly maximum temperature range

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Figure 4. Monthly average minimum and maximum temperature

Figure 5. Annual precipitation pattern

Figure 6. Annual average temperature pattern

Climate stations used

(1) WATERTOWN RGNL AP [USW00014946], Watertown, SD
(2) WATERTOWN 1W [USC00398930], Watertown, SD
(3) CASTLEWOOD [USC00391519], Castlewood, SD
(4) CLEAR LAKE [USC00391777], Clear Lake, SD
(5) ASTORIA 4S [USC00390422], White, SD
(6) TYLER [USC00218429], Tyler, MN
(7) WEBSTER [USC00399004], Webster, SD
(8) WAUBAY NWR [USC00398980], Waubay, SD

Soil features

Soils are very deep and are formed in alluvium. Surface textures are primarily silty clay loam and loam. These soils are poorly to very poorly drained.

Table 4. Representative soil features

Parent material	(1) Alluvium
Surface texture	(1) Silty clay loam (2) Loam (3) Silty clay
Family particle size	(1) Fine-silty (2) Fine-loamy
Drainage class	Very poorly drained to poorly drained
Permeability class	Slow to moderate
Soil depth	80 in
Surface fragment cover <=3"	5%
Surface fragment cover >3"	Not specified
Available water capacity (0-40in)	6.8 – 7.8 in
Soil reaction (1:1 water) (10-40in)	6.1 – 8.4
Subsurface fragment volume <=3" (0-60in)	15%
Subsurface fragment volume >3" (0-60in)	3%

Ecological dynamics

This site developed under Northern Great Plains climatic conditions, light to severe grazing by bison and other large herbivores, sporadic natural or man-caused wildfire (often of light intensities), fluctuating water tables and flooding events, and other biotic and abiotic factors that typically influence soil/site development. Changes will occur in the plant communities due to short-term weather variations, impacts of native and/or exotic plant and animal species, and management actions. While the following plant community descriptions describe more typical transitions that will occur, severe disturbances, such as periods of well below average precipitation, can cause significant shifts in plant communities and/or species composition that may not be described within this document.

Heavy continuous grazing without adequate recovery periods following each grazing occurrence over several years causes this site to depart from the interpretive plant community. Species such as sedge and rush will initially increase. Prairie cordgrass, northern reedgrass, and bluejoint reedgrass (Calamagrostis canadensis) will decrease in frequency and production. Heavy continuous grazing causes reed canarygrass (Phalaris arundinacea) to increase and eventually dominate the site. Extended periods of nonuse and no fire will result in a plant community having high litter levels, which also favors an increase in reed canarygrass, spikerush (Eleocharis), and bluegrass (Poa).

Interpretations are primarily based on the 1.1 Prairie Cordgrass-Northern Reedgrass-Woolly Sedge Plant Community Phase. It has been determined by study of rangeland relic areas, areas protected from excessive disturbance, and areas under long-term rotational grazing regimes. Trends in plant community dynamics ranging from heavily grazed to lightly grazed areas, seasonal use pastures, and historical accounts also have been used. Plant community phases, states, transitional pathways, and thresholds have been determined through similar studies and experience.

State and transition model

More interactive model formats are also available. View Interactive Models
Click on state and transition labels to scroll to the respective text

Ecosystem states

1. Reference State

2. Invaded State

3. Crop Production State

T1A	-	Heavy continuous grazing, sedimentation, non-use, and no fire
T1B	-	Tillage, artificial drainage (surface and subsurface)
R2	-	Long term prescribed grazing
T2	-	Tillage, artificial drainage (surface and subsurface)
T3	-	Abandonment of cropping

State 1 submodel, plant communities

1.1. Prairie Cordgrass-Northern Reedgrass-Woolly Sedge

1.2. Woolly Sedge-Green Bulrush-Prairie Cordgrass-Reed Canarygrass

1.1A	-	Heavy continuous grazing
1.2A	-	Prescribed grazing with recovery periods

State 2 submodel, plant communities

2.1. Reed Canarygrass-Spikerush-Fowl Bluegrass

2.2. Annual Pioneer-Perennial Pioneer

2.1A	-	Heavy continuous grazing
2.2A	-	Time without disturbance

State 3 submodel, plant communities

3.1. Annual Crops

State 1
Reference State

The Reference State represents the natural range of variability that dominates the dynamics of this ecological site (ES). This state is typically codominated by cool-season grass and grass-like species, and warm-season grasses. Before European settlement, the primary disturbance mechanisms for this site in the reference condition included sporadic fire and grazing by large herding ungulates. Frequent surface fires (3 to 5 years) and grazing coupled with weather events dictated the dynamics that occurred within the natural range of variability. Today the primary disturbance is from a lack of fire and concentrated livestock grazing. Grasses that are desirable for livestock and wildlife can decline and a corresponding increase in less desirable grasses will occur.

Dominant plant species

prairie cordgrass (Spartina pectinata), grass
northern reedgrass (Calamagrostis stricta ssp. inexpansa), grass
woolly sedge (Carex pellita), grass
green bulrush (Scirpus atrovirens), grass
broadfruit bur-reed (Sparganium eurycarpum), other herbaceous
giant goldenrod (Solidago gigantea), other herbaceous
New England aster (Symphyotrichum novae-angliae), other herbaceous
white panicle aster (Symphyotrichum lanceolatum), other herbaceous
cinquefoil (Potentilla), other herbaceous
Maximilian sunflower (Helianthus maximiliani), other herbaceous

Community 1.1
Prairie Cordgrass-Northern Reedgrass-Woolly Sedge

This community evolved with grazing by large herbivores, frequent surface fires and relatively frequent flooding and 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. The potential vegetation is about 65 percent grasses, 20 percent grass-like species, 10 percent forbs, and 5 percent shrubs by air-dry weight. Prairie cordgrass is the dominant tall warm-season grass occupying this plant community. Reedgrasses (Calamagrostis) are the dominant tall cool-season species. A variety of sedges (Cyperaceae) and rushes (Juncaceae) occur throughout this community as well as fowl mannagrass (Glyceria striata), switchgrass (Panicum virgatum), reed canarygrass, plains bluegrass (Poa arida), and fowl bluegrass (Poa palustris). Key forbs include broadfruit bur-reed (Sparganium eurycarpum), giant goldenrod (Solidago gigantea), New England aster (Symphyotrichum novae-angliae), Maximilian sunflower (Helianthus maximiliani), white panicle aster (Symphyotrichum lanceolatum), and cinquefoil (Potentilla). This plant community phase is diverse, stable, and productive, and is well adapted to the Northern Great Plains. The high water table supplies much of the moisture for plant growth. Community dynamics, nutrient cycle, water cycle, and energy flow are functioning properly. Plant litter is properly distributed with very little movement off-site and natural plant mortality is very low. The diversity in plant species allows for the variability of both the fluctuations of water table and reoccurring flooding. This is a sustainable plant community in terms of soil stability, watershed function, and biologic integrity.

Dominant plant species

prairie cordgrass (Spartina pectinata), grass
northern reedgrass (Calamagrostis stricta ssp. inexpansa), grass
woolly sedge (Carex pellita), grass
reedgrass (Calamagrostis), grass
sedge (Carex), grass
rush (Juncus), grass
fowl mannagrass (Glyceria striata), grass
switchgrass (Panicum virgatum), grass
reed canarygrass (Phalaris arundinacea), grass
plains bluegrass (Poa arida), grass
fowl bluegrass (Poa palustris), grass
broadfruit bur-reed (Sparganium eurycarpum), other herbaceous
giant goldenrod (Solidago gigantea), other herbaceous
New England aster (Symphyotrichum novae-angliae), other herbaceous
Maximilian sunflower (Helianthus maximiliani), other herbaceous
white panicle aster (Symphyotrichum lanceolatum), other herbaceous
cinquefoil (Potentilla), other herbaceous

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	5070	5408	5750
Forb	270	800	1280
Shrub/Vine	60	192	370
Total	5400	6400	7400

Figure 8. Plant community growth curve (percent production by month). SD0208, Rolling Till Prairie, lowland cool-season/warm-season codominant.. Cool-season, warm-season codominant, lowland..

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	11	19	23	20	12	6	5	0	0

Community 1.2
Woolly Sedge-Green Bulrush-Prairie Cordgrass-Reed Canarygrass

This plant community will slowly develop from the adverse effects of continuous grazing, without adequate recovery periods during the growing season following periods of below normal precipitation. Lack of litter and reduced plant heights result in higher soil temperatures and reduced water infiltration rates. Recognition of this plant community will enable the land user to implement key management decisions before a significant ecological threshold is crossed. When compared to the 1.1 Prairie Cordgrass-Northern Reedgrass-Woolly Sedge Plant Community Phase, prairie cordgrass has decreased. Sedge, rush, and other grass-like species are dominant. The grass-like species have increased while the reedgrass species have been significantly reduced. Switchgrass may be removed at this stage. Reed canarygrass may begin to increase significantly. Forb species would include asters (Aster), goldenrod (Solidago), and cinquefoil, as well as, a possible invasion of Canada thistle (Cirsium arvense). Plant production and frequency have been reduced. The water cycle, nutrient cycle, and energy flow are slightly reduced but continue to function adequately.

Dominant plant species

woolly sedge (Carex pellita), grass
prairie cordgrass (Spartina pectinata), grass
green bulrush (Scirpus atrovirens), grass
reed canarygrass (Phalaris arundinacea), grass
aster (Aster), other herbaceous
goldenrod (Solidago), other herbaceous
cinquefoil (Potentilla), other herbaceous

Figure 9. 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	4500	5046	–
Forb	245	580	–
Shrub/Vine	55	174	–
Total	4800	5800	–

Figure 10. Plant community growth curve (percent production by month). SD0207, Rolling Till Prairie, cool-season dominant, warm-season subdominant.. Cool-season dominant, warm-season subdominant, lowland..

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	5	13	20	25	18	11	5	3	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 Woolly Sedge-Green Bulrush-Prairie Cordgrass-Reed Canarygrass Plant Community Phase.

Pathway 1.2A
Community 1.2 to 1.1

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 1.1 Prairie Cordgrass-Northern Reedgrass-Woolly Sedge Plant Community Phase. This pathway could also occur with a return to more normal precipitation levels and frequencies.

Conservation practices

Prescribed Grazing

State 2
Invaded State

This state is characterized by the degradation of the biotic integrity of the site due to excessive disturbance resulting in dominance by highly competitive species such as reed canarygrass and possibly the invasion of nonnative species. Loss of diversity and reduction of plant vigor and production have negatively impacted energy flow and nutrient cycling. Infiltration is reduced and native plant mortality is increased. As the disturbance level increases, native plant density decreases even more, giving way to annual species and invasive perennial species, as well as, an increase in bare ground.

Dominant plant species

reed canarygrass (Phalaris arundinacea), grass
spikerush (Eleocharis), grass
fowl bluegrass (Poa palustris), grass

Community 2.1
Reed Canarygrass-Spikerush-Fowl Bluegrass

This plant community phase develops either with increased sedimentation, heavy continuous grazing, or with a long-term lack of grazing and/or no surface fire. In each case, native plant vigor is reduced allowing the increase of competitive species and eventually the introduction of nonnative species. Spikerush and other grass-like species, as well as, bluegrasses will increase. The more competitive forbs will also increase. Reed canarygrass often will increase to the point of dominance while prairie cordgrass will diminish significantly. Other invasive plants such as creeping meadow foxtail (Alopecurus arundinaceus) or Canada thistle may become prevalent if a seed source is present or nearby. Nutrient cycling will be greatly diminished and the energy flow will shift significantly and be reduced as well. Infiltration will be reduced somewhat compared to the Reference State. This plant community is somewhat resistant to change. The combination of both grazing and fire is most effective in moving this plant community towards the Reference State.

Dominant plant species

reed canarygrass (Phalaris arundinacea), grass
spikerush (Eleocharis), grass
fowl bluegrass (Poa palustris), grass

Figure 11. 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	3400	3956	4485
Forb	200	575	960
Shrub/Vine	0	69	155
Total	3600	4600	5600

Figure 12. Plant community growth curve (percent production by month). SD0206, Rolling Till Prairie, lowland cool-season dominant.. Cool-season dominant, lowland..

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	6	15	20	26	17	9	4	3	0	0

Community 2.2
Annual Pioneer-Perennial Pioneer

This plant community developed with heavy continuous grazing without adequate recovery periods between grazing events or abandonment after cropping. The dominant vegetation includes pioneer annual or perennial grasses, forbs, invaders, and early successional biennial and perennial species. Grasses may include inland saltgrass (Distichlis spicata), foxtail barley (Hordeum jubatum), barnyardgrass (Echinochia crus-galli), quackgrass (Elymus repens), fowl bluegrass, Kentucky bluegrass (Poa pratensis), Mountain rush (also known as Baltic rush) (Juncus arcticus), and sedges. The dominant forbs may include cocklebur (Xanthium), Canada thistle, and other early successional species. The community is susceptible to invasion of nonnative species due to severe soil disturbances and relatively high percent of bare ground. This plant community is resistant to change as long as soil disturbance or severe vegetation defoliation persists, thus holding back secondary plant succession. Significant economic inputs, management, and time would be required to move this plant community toward a higher successional stage. Secondary succession is highly variable, depending upon availability and diversity of a viable reproductive source of higher successional species. This plant community may be renovated to improve the production capability but management changes would be needed to maintain the new plant community.

Dominant plant species

saltgrass (Distichlis spicata), grass
foxtail barley (Hordeum jubatum), grass
barnyardgrass (Echinochloa crus-galli), grass
quackgrass (Elymus repens), grass
fowl bluegrass (Poa palustris), grass
Kentucky bluegrass (Poa pratensis), grass
arctic rush (Juncus arcticus), grass
sedge (Carex), grass
cocklebur (Xanthium), other herbaceous
Canada thistle (Cirsium arvense), other herbaceous

Pathway 2.1A
Community 2.1 to 2.2

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 2.2 Annual Pioneer-Perennial Pioneer Plant Community Phase.

Pathway 2.2A
Community 2.2 to 2.1

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 2.1 Reed Canarygrass-Spikerush-Fowl Bluegrass Plant Community Phase.

State 3
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
beet (Beta), other herbaceous

Community 3.1
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

Sedimentation beyond normal levels due to increased flooding or non-use and 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, or heavy continuous grazing will likely lead this state over a threshold resulting in the 2.1 Reed Canarygrass-Spikerush-Fowl Bluegrass Plant Community Phase within the Invaded State (State 2).

Transition T1B
State 1 to 3

Tillage, Artificial drainage (surface and subsurface) will cause a shift over a threshold leading to the 3.1 Annual Crops within the Crop Production State (State 3).

Restoration pathway R2
State 2 to 1

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) may lead this plant community phase over a threshold to the Reference State (State 1). Wetland restoration techniques may be necessary to restore biotic integrity and plant diversity and productivity.

Conservation practices

Prescribed Grazing
Wetland Restoration

Transition T2
State 2 to 3

Tillage, Artificial drainage (surface and subsurface) will cause a shift over a threshold leading to the 3.1 Annual Crops within the Crop Production State (State 3).

Transition T3
State 3 to 2

Cropping followed by abandonment may lead this plant community phase over a threshold to the Invaded State (State 2) and more specifically to the 2.2 Annual Pioneer-Perennial Pioneer Plant Community Phase.

Additional community tables

Table 8. Community 1.1 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (lb/acre)	Foliar cover (%)
Grass/Grasslike
1	Tall Cool-season Grasses			1280–2880
	prairie cordgrass	SPPE	Spartina pectinata	1280–2560	–
	spiked muhly	MUGL3	Muhlenbergia glomerata	0–320	–
	switchgrass	PAVI2	Panicum virgatum	0–320	–
2	Cool-season Grasses			640–1920
	northern reedgrass	CASTI3	Calamagrostis stricta ssp. inexpansa	128–1280	–
	bluejoint	CACA4	Calamagrostis canadensis	128–960	–
	slimstem reedgrass	CASTS5	Calamagrostis stricta ssp. stricta	128–512	–
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–320	–
	reed canarygrass	PHAR3	Phalaris arundinacea	64–320	–
	fowl bluegrass	POPA2	Poa palustris	64–192	–
	Canada wildrye	ELCA4	Elymus canadensis	64–192	–
	fowl mannagrass	GLST	Glyceria striata	64–192	–
3	Grass-likes			320–1600
	fox sedge	CAVU2	Carex vulpinoidea	64–640	–
	woolly sedge	CAPE42	Carex pellita	64–640	–
	awlfruit sedge	CAST5	Carex stipata	0–512	–
	bottlebrush sedge	CAHY4	Carex hystericina	0–512	–
	smoothcone sedge	CALA12	Carex laeviconica	0–512	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–320	–
	green bulrush	SCAT2	Scirpus atrovirens	0–320	–
	flatsedge	CYPER	Cyperus	0–192	–
	spikerush	ELEOC	Eleocharis	64–192	–
	rush	JUNCU	Juncus	64–192	–
Forb
4	Forbs			320–1280
	Forb, native	2FN	Forb, native	64–320	–
	milkweed	ASCLE	Asclepias	64–192	–
	American licorice	GLLE3	Glycyrrhiza lepidota	64–192	–
	goldenrod	SOLID	Solidago	64–192	–
	broadfruit bur-reed	SPEU	Sparganium eurycarpum	64–192	–
	New England aster	SYNO2	Symphyotrichum novae-angliae	64–192	–
	broadleaf cattail	TYLA	Typha latifolia	0–192	–
	prairie ironweed	VEFA2	Vernonia fasciculata	0–128	–
	meadow zizia	ZIAP	Zizia aptera	64–128	–
	white panicle aster	SYLA6	Symphyotrichum lanceolatum	64–128	–
	marsh skullcap	SCGA	Scutellaria galericulata	0–128	–
	marsh fleabane	SECO2	Senecio congestus	0–128	–
	hemlock waterparsnip	SISU2	Sium suave	64–128	–
	Maximilian sunflower	HEMA2	Helianthus maximiliani	64–128	–
	common boneset	EUPE3	Eupatorium perfoliatum	64–128	–
	wild mint	MEAR4	Mentha arvensis	0–128	–
	water knotweed	POAM8	Polygonum amphibium	0–128	–
	curlytop knotweed	POLA4	Polygonum lapathifolium	64–128	–
	northern water plantain	ALTR7	Alisma triviale	0–128	–
	Canadian anemone	ANCA8	Anemone canadensis	64–128	–
	Indianhemp	APCA	Apocynum cannabinum	64–128	–
	silverweed cinquefoil	ARAN7	Argentina anserina	64–128	–
	nodding beggartick	BICE	Bidens cernua	0–64	–
	spotted water hemlock	CIMA2	Cicuta maculata	0–64	–
	Illinois bundleflower	DEIL	Desmanthus illinoensis	0–64	–
	Macoun's buttercup	RAMA2	Ranunculus macounii	0–64	–
	western dock	RUAQ	Rumex aquaticus	0–64	–
	Virginia strawberry	FRVI	Fragaria virginiana	0–64	–
	rough bugleweed	LYAS	Lycopus asper	0–64	–
Shrub/Vine
5	Shrubs			64–320
	false indigo bush	AMFR	Amorpha fruticosa	64–320	–
	willow	SALIX	Salix	0–192	–
	Forb, native	2FN	Forb, native	0–192	–

Table 9. Community 1.2 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (lb/acre)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-season Grasses			290–1450
	prairie cordgrass	SPPE	Spartina pectinata	290–1450	–
	switchgrass	PAVI2	Panicum virgatum	0–116	–
2	Cool-season Grasses			290–1450
	reed canarygrass	PHAR3	Phalaris arundinacea	116–696	–
	fowl bluegrass	POPA2	Poa palustris	58–464	–
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–290	–
	northern reedgrass	CASTI3	Calamagrostis stricta ssp. inexpansa	0–290	–
	bluejoint	CACA4	Calamagrostis canadensis	0–232	–
	slimstem reedgrass	CASTS5	Calamagrostis stricta ssp. stricta	0–174	–
	fowl mannagrass	GLST	Glyceria striata	0–116	–
	Canada wildrye	ELCA4	Elymus canadensis	0–58	–
3	Grass-likes			870–2610
	woolly sedge	CAPE42	Carex pellita	58–870	–
	fox sedge	CAVU2	Carex vulpinoidea	58–870	–
	rush	JUNCU	Juncus	116–870	–
	awlfruit sedge	CAST5	Carex stipata	58–580	–
	bottlebrush sedge	CAHY4	Carex hystericina	58–580	–
	smoothcone sedge	CALA12	Carex laeviconica	58–580	–
	spikerush	ELEOC	Eleocharis	116–464	–
	flatsedge	CYPER	Cyperus	0–406	–
	green bulrush	SCAT2	Scirpus atrovirens	0–232	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–174	–
Forb
4	Forbs			290–870
	goldenrod	SOLID	Solidago	58–348	–
	broadfruit bur-reed	SPEU	Sparganium eurycarpum	0–290	–
	New England aster	SYNO2	Symphyotrichum novae-angliae	58–290	–
	broadleaf cattail	TYLA	Typha latifolia	0–232	–
	Forb, introduced	2FI	Forb, introduced	58–232	–
	Forb, native	2FN	Forb, native	0–174	–
	Indianhemp	APCA	Apocynum cannabinum	58–174	–
	American licorice	GLLE3	Glycyrrhiza lepidota	58–174	–
	white panicle aster	SYLA6	Symphyotrichum lanceolatum	58–174	–
	spotted water hemlock	CIMA2	Cicuta maculata	0–116	–
	milkweed	ASCLE	Asclepias	0–116	–
	water knotweed	POAM8	Polygonum amphibium	0–116	–
	curlytop knotweed	POLA4	Polygonum lapathifolium	0–58	–
	Macoun's buttercup	RAMA2	Ranunculus macounii	0–58	–
	marsh skullcap	SCGA	Scutellaria galericulata	0–58	–
	hemlock waterparsnip	SISU2	Sium suave	0–58	–
	prairie ironweed	VEFA2	Vernonia fasciculata	0–58	–
	meadow zizia	ZIAP	Zizia aptera	0–58	–
	nodding beggartick	BICE	Bidens cernua	0–58	–
	Maximilian sunflower	HEMA2	Helianthus maximiliani	0–58	–
	wild mint	MEAR4	Mentha arvensis	0–58	–
	silverweed cinquefoil	ARAN7	Argentina anserina	0–58	–
	Canadian anemone	ANCA8	Anemone canadensis	0–58	–
Shrub/Vine
5	Shrubs			58–290
	false indigo bush	AMFR	Amorpha fruticosa	58–290	–
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–116	–
	meadow willow	SAPE5	Salix petiolaris	0–58	–

Table 10. Community 2.1 plant community composition

Group	Common name	Symbol	Scientific name	Annual production (lb/acre)	Foliar cover (%)
Grass/Grasslike
1	Tall Warm-season Grasses			0–230
	prairie cordgrass	SPPE	Spartina pectinata	0–230	–
2	Cool-season Grasses			920–2070
	reed canarygrass	PHAR3	Phalaris arundinacea	690–1840	–
	fowl bluegrass	POPA2	Poa palustris	92–460	–
	Graminoid (grass or grass-like)	2GRAM	Graminoid (grass or grass-like)	0–230	–
3	Grass-likes			690–2070
	spikerush	ELEOC	Eleocharis	460–1150	–
	rush	JUNCU	Juncus	230–920	–
	woolly sedge	CAPE42	Carex pellita	0–230	–
	awlfruit sedge	CAST5	Carex stipata	0–230	–
	fox sedge	CAVU2	Carex vulpinoidea	0–230	–
	bottlebrush sedge	CAHY4	Carex hystericina	0–230	–
	smoothcone sedge	CALA12	Carex laeviconica	0–138	–
	flatsedge	CYPER	Cyperus	0–92	–
	green bulrush	SCAT2	Scirpus atrovirens	0–46	–
	Grass-like (not a true grass)	2GL	Grass-like (not a true grass)	0–46	–
Forb
4	Forbs			230–290
	Forb, introduced	2FI	Forb, introduced	46–552	–
	goldenrod	SOLID	Solidago	46–368	–
	New England aster	SYNO2	Symphyotrichum novae-angliae	46–276	–
	broadleaf cattail	TYLA	Typha latifolia	46–276	–
	white panicle aster	SYLA6	Symphyotrichum lanceolatum	46–276	–
	American licorice	GLLE3	Glycyrrhiza lepidota	0–92	–
	Forb, native	2FN	Forb, native	0–92	–
	Indianhemp	APCA	Apocynum cannabinum	0–92	–
	milkweed	ASCLE	Asclepias	0–46	–
	spotted water hemlock	CIMA2	Cicuta maculata	0–46	–
	water knotweed	POAM8	Polygonum amphibium	0–46	–
	broadfruit bur-reed	SPEU	Sparganium eurycarpum	0–46	–
Shrub/Vine
5	Shrubs			0–138
	false indigo bush	AMFR	Amorpha fruticosa	0–138	–
	Shrub (>.5m)	2SHRUB	Shrub (>.5m)	0–46	–

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.

Prairie Cordgrass/Reedgrass/Sedge (1.1)
Average Annual Production (lbs./acre, air-dry): 6400
Stocking Rate* (AUM/acre): 1.75

Sedge/Rush/Prairie Codgrass/Reed Canarygrass (1.2)
Average Annual Production (lbs./acre, air-dry): 5800
Stocking Rate* (AUM/acre): 1.59

Reed Canarygrass/Spikerush/Bluegrass (2.1)
Average Annual Production (lbs./acre, air-dry): 4600
Stocking Rate* (AUM/acre): 1.26

Annual/Pioneer Perennial (2.2)
Average Annual Production (lbs./acre, air-dry): 1600
Stocking Rate* (AUM/acre): 0.44

*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 groups C and D. Infiltration is typically slow to very slow and runoff potential for this site varies from negligible 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 lower 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 (0011346039) 2007 SD Deuel
NP-ESC-1 (0090746039) 2007 SD Deuel
NP-ESC-1 (0040846039) 2008 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.

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-

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@sd.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 6. Typically high root content, and organic matter. 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 >> mid & tall cool-season grass-likes

Sub-dominant:
> tall cool-season rhizomatous grass > tall cool-season bunch grass = short cool-season grass = forb = shrub

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 1-3 inches. Litter cover is in contact with soil surface.
Expected annual annual-production (this is TOTAL above-ground annual-production, not just forage annual-production):
5800 – 7000 lbs./acre air-dry weight, average 6,400 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 reed canarygrass.
Perennial plant reproductive capability:
All species are capable of reproducing.

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Ecosystem states

1. Reference State

2. Invaded State

3. Crop Production State

T1A	-	Heavy continuous grazing, sedimentation, non-use, and no fire
T1B	-	Tillage, artificial drainage (surface and subsurface)
R2	-	Long term prescribed grazing
T2	-	Tillage, artificial drainage (surface and subsurface)
T3	-	Abandonment of cropping