SOUTH DAKOTA KEY TO LAND CAPABILITY UNITS IN MLRA\'s 102 AND 107

[CLASS I SOILS: VERY DEEP 1/ SOILS IN MLRA\'s 102 AND 107 WITH SILT
LOAM, LOAM, CLAY LOAM, SILTY CLAY LOAM, SANDY CLAY LOAM, SILTY CLAY, AND
CLAY SURFACE LAYERS, ON 0 TO 2 PERCENT SLOPES]{.underline}

A. soils on flood plains, well and moderately well drained, rarely
flooded

> 1\. non-calcareous\* soils with loamy and silty subsoils (10-35% clay)
> I-1
>
> 2\. calcareous\*\* soils with silty subsoil (10-18 % clay) I-2

B. soils on uplands (non-flooded)

> 1\. soils with loamy and silty subsoils (18-35% clay) overlying loamy,
> silty , and clayey material
>
> a\. moderately well drained soils I-3
>
> b\. well drained soils I-4
>
> 2\. soils with silty subsoil (18-35% clay), 40-60\" over gravelly
> material
>
> a\. moderately well drained soils I-5
>
> b\. well drained soils I-6
>
> 3\. soils with clayey subsoil (35-40% clay), well drained I-7

[CLASS IIe SOILS: DEEP AND VERY DEEP 1/, NON-CALCAREOUS\* SOILS IN
MLRA\'s 102 AND 107 ON 2 TO 6 PERCENT SLOPES]{.underline}

A. soils with silt loam, loam, clay loam, silty clay loam or sandy clay
loam surface layer

> 1\. soils with loamy and silty subsoils (18-35% clay) overlying loamy,
> silty, and clayey material
>
> a\. moderately well drained soils IIe-1
>
> b\. well drained soils IIe-2
>
> 2\. soils with silty subsoil (18-35% clay), well drained, 40-60\" over
> gravelly
>
> material IIe-3

B. soils with silty clay and clay surface layer, with clayey subsoil
(35-60% clay) IIe-4

[CLASS IIe SOILS: SOILS IN MLRA\'s 102 AND 107 WITH 0 TO 2%
SLOPES]{.underline}

A. soils on flood plains and outwash plains

> 1\. soils \>40\" to gravelly material
>
> a\. non-calcareous\*, well and moderately well drained soils with
> loamy
>
> and silty subsoils (10-18% clay) IIs-1
>
> b\. calcareous\*\*, somewhat poorly drained soils with loamy subsoil
>
> (18-35% clay) IIs-2
>
> 2\. soils 20-40\" over gravelly material with loamy and silty subsoils
> (18-35% clay)
>
> a\. non-calcareous\*, well and moderately well drained soils IIs-3
>
> b\. calcareous\*\*, moderately well and somewhat poorly drained soils
> IIs-4

B. soils on uplands

> 1\. deep and very deep soils [1]{.underline}/
>
> a\. calcareous\*\* soils
>
> \(1\) moderately well and somewhat poorly drained soils with
>
> loamy and silty subsoils (18-35% clay) IIs-5
>
> \(2\) well drained soils with sandy subsoil (\<10% clay) IIs-6
>
> b\. non-calcareous\* soils
>
> \(1\) soils [without]{.underline} sodium-affected subsoil
>
> \(a\) soils with loamy subsoil (10-18% clay), 20-40\" over silty,
> loamy, and clayey material
>
> 1\. moderately well drained soils IIs-7
>
> 2\. well drained soils IIs-8
>
> \(b\) soils with loamy subsoil (10-18% clay)
>
> 1\. moderately well drained soils IIs-9
>
> 2\. well drained soils IIs-10
>
> \(c\) soils with sandy subsoil (\<10% clay), 20-40\" over loamy
> material, moderately well drained IIs-11
>
> \(d\) soils with sandy subsoil (\<10% clay), well and somewhat
>
> excessively drained IIs-12
>
> \(e\) soils with clayey subsoil (35-60% clay), well and moderately
>
> well drained IIs-13
>
> \(2\) soils [with]{.underline} sodium-affected, clayey (35-60% clay)
> subsoil,
>
> moderately well drained IIs-14
>
> 2\. moderately deep [1]{.underline}/, non-calcareous\*, well drained
> soils with
>
> silty subsoil (18-35% clay) IIs-15

[CLASS IIw SOILS: VERY DEEP 1/ SOILS IN ALL MLRA\'s ON SLOPES OF 0 TO 2%
(ALSO INCLUDES DRAINED PHASES OF CLASS IIIw AND IVw SOILS)]{.underline}

A. undrained, somewhat poorly drained, non-calcareous\* soils

> 1\. soils \>40\" over gravelly material
>
> a\. soils with loamy subsoil (10-35% clay) IIw-1
>
> b\. soils with clayey subsoil (35-60% clay) IIw-2
>
> 2\. soils 20-40\" over gravelly material, with loamy subsoil
>
> (18-35% clay) IIw-3

B. drained phases of class IIIw and IVw soils

> 1\. soils on flood plains and terraces
>
> a\. non-calcareous\* soil \>40\" over gravelly material
>
> \(1\) soils with clayey subsoil (35-60% clay) IIw-4
>
> \(2\) soils with silty subsoil (18-35% clay) IIw-5
>
> \(3\) soils with sandy subsoil (\<10% clay) IIw-6
>
> b\. calcareous\*\* soils
>
> \(1\) soils \>40\" to gravelly material
>
> \(a\) soils with loamy and silty subsoils (10-35% clay) IIw-7
>
> \(b\) soils with clayey subsoil (35-60% clay) IIw-8
>
> \(2\) soils with loamy subsoil (18-35% clay) IIw-9
>
> \(a\) soils with loamy subsoil (18-35% clay) IIw-9
>
> \(b\) soils with clayey subsoil (35-60% clay) IIw-10
>
> 2\. soils on uplands
>
> a\. soils adjacent depressions
>
> \(1\) calcareous\*\*, soils with loamy (18-35% clay) subsoil IIw-11
>
> \(2\) non-calcareous\*, soils with sandy subsoil (\<10% clay) IIw-12
>
> b\. soils in depressions
>
> \(1\) calcareous\*\* soils
>
> \(a\) soils with loamy subsoil (10-18% clay) IIw-13
>
> \(b\) soils with clayey subsoil (35-60% clay) IIw-14
>
> \(2\) non-calcareous\* soils
>
> \(a\) soils with sandy subsoil (\<10% clay) IIw-15
>
> \(b\) soils with clayey subsoil (35-60% clay) IIw-16

[CLASS IIIe SOILS IN MLRA\'s 102 AND 107]{.underline}

A. deep and very deep soils [1]{.underline}/

> 1\. non-calcareous\* soils
>
> a\. soils on moraines
>
> \(1\) soils with loamy and silty subsoils (18-35% clay), on 6-9%
> slopes
>
> \(a\) well and moderately well drained soils on foot slopes IIIe-1
>
> \(b\) well drained soils on summits and back slopes IIIe-2
>
> \(2\) soils with clayey subsoil (35-60% clay) and clay and silty clay
>
> surface layers, on 6-9% slopes IIIe-3
>
> \(3\) soils with clayey subsoil (\>60% clay) and clay surface layer,
>
> on 2-9% slopes IIIe-4
>
> b\. soils on outwash plains and terraces (2-6% slopes)
>
> \(1\) soils 20-40\" over gravelly and sandy material, well drained,
>
> with loam and silt loam surface layers and loamy and silty
>
> subsoils (18-35% clay) IIIe-5
>
> \(2\) soils \>40\" over gravelly material with sandy loam surface
> layer
>
> \(a\) soils with loamy subsoil (10-18% clay)
>
> 1\. well and moderately well drained soils on foot slopes IIIe-6
>
> 2\. well drained soils on summits and back slopes IIIe-7
>
> \(b\) soils with sandy subsoil (\<10% clay), well and somewhat
>
> excessively drained IIIe-8
>
> 2\. calcareous\*\* soils on 2-6% slopes
>
> a\. well drained soils IIIe-9
>
> b\. moderately well and somewhat poorly drained soils IIIe-10

B. moderately deep [1]{.underline}/, well drained soils with silty
subsoil

(18-35% clay), on 2-6% slopes IIIe-11

[CLASS IIIs SOILS IN MLRA\'s 102 AND 107 ON 0-2% SLOPES WITH LOAMY
SUBSOIL (18-35% CLAY), 10-20\" OVER GRAVELLY MATERIAL]{.underline}

A. rarely flooded, well drained soils IIIs-1

B. non-flooded, somewhat excessively drained soils IIIs-2

[CLASS IIIw SOILS: VERY DEEP 1/ SOILS IN ALL MLRA\'s ON 0 TO 2 PERCENT
SLOPES (ALSO INCLUDES DRAINED PHASES OF CLASS Vw SOILS)]{.underline}

A. undrained, somewhat poorly drained soils

> 1\. soils with loamy and silty subsoils (10-35% clay) IIIw-1
>
> 2\. soils with clayey subsoil (35-60% clay)
>
> a\. soils 20-40\" over loamy material IIIw-2
>
> b\. soils 20-40\" over gravelly material IIIw-3
>
> 3\. soils with sandy subsoil (\<10% clay) IIIw-4

B. drained phases of Vw soils

> 1\. undisturbed soils
>
> a\. soils on floodplains
>
> \(1\) soils with loamy subsoil (18-35% clay) IIIw-5
>
> \(2\) soils with clayey subsoil (\>35% clay) IIIw-6
>
> b\. soils in upland depressions, with clayey subsoil (\>35% clay)
> IIIw-7
>
> 2\. soils disturbed by human [2]{.underline}/ IIIw-8

[CLASS IVe SOILS IN MLRA\'s 102 AND 107, VERY DEEP 1/ SOILS ON
UPLANDS]{.underline}

A. very deep [1]{.underline}/ soils

> 1\. soils with loamy and silty subsoils (18-35% clay)
>
> a\. non-calcareous\*, well drained soils on 9-15% slopes IVe-1
>
> b\. calcareous\*\*, well drained soils, on 6-9% slopes IVe-2
>
> 2\. soils with loamy and silty subsoils (18-35% clay), well drained,
> 20-40\" over gravelly material, on 6-9% slopes IVe-3
>
> 3\. soils with loamy subsoil (18-35% clay), somewhat excessively
>
> drained, 10-20\" over gravelly material, on 6-9% slopes IVe-4
>
> 4\. soils with clayey subsoil (35-60% clay), well and moderately well
>
> drained, on 9-15% slopes IVe-5
>
> 5\. soils with loamy and silty subsoils (10-18% clay), well drained,
>
> on 6-9% slopes
>
> a\. non-calcareous\* soils IVe-6
>
> b\. calcareous\*\* soils IVe-7
>
> 6\. soils with sandy subsoil (\<10% clay), well and somewhat
> excessively
>
> drained, on 6-9% slopes IVe-8
>
> 7\. soils disturbed by human [2]{.underline}/ with loam and clay loam
> surface,
>
> on 0-15 percent slopes IVe-9

B. moderately deep [1]{.underline}/, well drained soils with silty
subsoil

(18-35% clay), on 6-9% slopes IVe-10

[CLASS IVs SOILS IN MLRA\'s 102 AND 107]{.underline}

A. soils with sandy subsoil (\<10% clay) and loamy sand surface layer

> 1\. moderately well drained soils on 0-2% slopes IVs-1
>
> 2\. well drained to excessively drained soils, on 2-6% slopes IVs-2

B. soils with loamy subsoil (18-35% clay), somewhat excessively drained,

10-20\" over gravelly material, on 2-6% slopes IVs-3

C. soils with clayey (35-60% clay), sodium-affected subsoil,

moderately well drained, on 0-2% slopes IVs-4

[CLASS IVw SOILS: VERY DEEP 1/, POORLY DRAINED SOILS IN ALL
MLRA\'s]{.underline}

A. soils on flood plains, lake plains, and upland toe slopes

> 1\. soils \>40\" over gravelly material
>
> a\. non-calcareous\* soils
>
> \(1\) soils with loamy and clayey subsoils (18-60% clay) IVw-1
>
> \(2\) soils with sandy subsoil (\<18% clay) IVw-2
>
> b\. calcareous\*\* soils
>
> \(1\) soils with loamy and silty subsoils (10-35% clay) IVw-3
>
> \(2\) soils with clayey subsoil (35-60% clay) IVw-4
>
> 2\. calcareous\*\* soils 20-40\" over gravelly material, with loamy
> subsoil
>
> (18-35% clay) IVw-5

B. soils on uplands

> 1\. soils adjacent depressions
>
> a\. calcareous\*\* soils with loamy and silty subsoils (18-35% clay)
> IVw-6
>
> b\. non-calcareous\* soils with sandy subsoil (\<18% clay) IVw-7
>
> 2\. soils in depressions
>
> a\. calcareous\*\* soils
>
> \(1\) soils with loamy subsoil (10-18% clay) IVw-8
>
> \(2\) soils with clayey subsoil (35-60% clay) IVw-9
>
> b\. non-calcareous\* soils with loamy and clayey subsoils (18-60%
> clay) IVw-10

[CLASS Vw SOILS: VERY DEEP 1/, CALCAREOUS\*\* AND NON-CALCAREOUS\*, VERY
POORLY DRAINED SOILS ON 0 TO 2 PERCENT SLOPES, IN ALL
MLRA\'s]{.underline}

A. undisturbed soils

> 1\. soils on flood plains and lake plains
>
> a\. soils with loamy, silty, and clayey subsoils (10-35% clay) Vw-1
>
> b\. soils with clayey (\>35% clay) subsoil Vw-2
>
> 2\. soils in upland depressions with clayey (\>35% clay) subsoil Vw-3

B. soils disturbed by human [2]{.underline}/ Vw-4

[CLASS VIe SOILS IN MLRA\'s 102 AND 107, SOILS ON UPLANDS]{.underline}

A. moderately deep, deep, and very deep soils [1]{.underline}/

> 1\. soils with sandy loam through clay surface layer
>
> a\. soils with loamy and silty subsoils (18-35% clay)
>
> \(1\) non-calcareous\*, well drained soils on 15-25% slopes VIe-1
>
> \(2\) calcareous\*\*, well drained soils on 9-15% slopes VIe-2
>
> b\. soils with loamy and silty subsoils (10-18% clay),
>
> calcareous\*\*, well drained, on 9-15% slopes VIe-3
>
> c\. soils with loamy subsoil (18-35% clay), 10-20\" over
>
> gravelly material, somewhat excessively drained,
>
> non-calcareous\*, on 9-15% slopes VIe-4
>
> d\. soils with clayey subsoil (35-60% clay), on 9-15% slopes VIe-5
>
> 2\. soils with loamy sand surface layer and sandy subsoil (\<10%
> clay),
>
> on 9-15% slopes, somewhat excessively drained VIe-6

B. shallow soils [1]{.underline}/ with loamy subsoil (10-35% clay), on
9-15% slopes VIe-7

[CLASS VIs SOILS IN MLRA\'s 102 AND 107]{.underline}

A. somewhat excessively and excessively drained soils

> 1\. soils with sandy subsoil (\<10% clay) on 0-25% slopes VIs-1
>
> 2\. soils \<10\" over gravelly material on 0-25% slopes VIs-2

B. soils with clayey (35-60% clay) subsoil, on 0-2% slopes

> 1\. soils with sodium-affected subsoil, somewhat poorly drained VIs-3
>
> 2\. saline soils (EC 8-16), poorly drained VIs-4

[CLASS VIw SOILS: VERY DEEP 1/, CALCAREOUS\*\* AND NON-CALCAREOUS\*,
CHANNELED SOILS ON FLOOD PLAINS IN ALL MLRA\'s]{.underline}

A. excessively drained soils with sandy subsoil (\<10% clay) VIw-1

B. well and moderately well drained soils

> 1\. soils with loamy and silty subsoils (10-35% clay) VIw-2
>
> 2\. soils with clayey subsoil (\>35% clay) VIw-3

C. somewhat poorly drained soils with loamy and silty subsoils (10-35%
clay) VIw-4

D. poorly and very poorly drained soils

> 1\. soils [without]{.underline} sodium-affected and/or saline subsoil
>
> a\. soils with sandy subsoil (\<10% clay) VIw-5
>
> b\. soils with silty subsoil (10-35% clay) VIw-6
>
> c\. soils with clayey (\>35% clay) subsoil VIw-7
>
> 2\. soils [with]{.underline} sodium-affected and/or saline subsoil
> VIw-8

[CLASS VIIe SOILS IN MLRA\'s 102 AND 107]{.underline}

A. very deep soils [1]{.underline}/

> 1\. soils with loamy and silty subsoils (18-35% clay), well drained,
> on 25-40% slopes
>
> a\. non-calcareous\* soils VIIe-1
>
> b\. calcareous\*\* soils VIIe-2
>
> 2\. soils with clayey subsoil (35-60% clay), well drained,
>
> non-calcareous\*, on 25-40% slopes VIIe-3
>
> 3\. soils with sandy and loamy (\<18% clay) subsoil
>
> a\. excessively drained soils on 0-9% slopes VIIe-4
>
> b\. well drained and somewhat excessively drained soils on 9-40%
> slopes VIIe-5

B. shallow soils [1]{.underline}/ on 15-40% slopes

> 1\. soils with loamy subsoil (10-35% clay) VIIe-6
>
> 2\. soils with clayey subsoil (35-60% clay) VIIe-7

[CLASS VIIs SOILS IN MLRA\'s 102 AND 107]{.underline}

A. somewhat excessively and excessively drained soils with stony

and bouldery surface, on 2-40% slopes VIIs-1

B. well drained soils with stony and bouldery surface on 2-40% slopes
VIIs-2

C. somewhat poorly drained, calcareous\*\* soils with stony surface, on
2-6% slopes VIIs-3

[CLASS VIIIs SOILS: SOILS DISTURBED BY HUMAN 2/, IN ALL
MLRA\'s]{.underline}

> 1\. poorly and very poorly drained soils on 0-1% slopes VIIIs-1
>
> 2\. moderately well to excessively drained soils on 0-90% slopes
>
> a\. gravel pits VIIIs-2
>
> b\. borrow pits VIIIs-3
>
> c\. mining areas VIIIs-4
>
> d\. dumps VIIIs-5
>
> e\. quarries VIIIs-6
>
> f\. dune land VIIIs-7
>
> g\. blownout land VIIIs-8

[CLASS VIIIw SOILS: VERY DEEP 1/, VERY POORLY DRAINED SOILS IN ALL
MLRA\'s]{.underline}

A. soils on flood plains VIIIw-1

B. soils in upland depressions VIIIw-2

NOTE: soils with \<10% clay in the subsoil are in the sandy family

soils with 10-18% clay in the subsoil are coarse-loamy or coarse-silty

soils with 18-35% clay in the subsoil are fine-loamy or fine-silty

soils with 35-60% clay in the subsoil are in the fine family

soils with \>60% clay in the subsoil are in the very fine family

\* non-calcareous soils [lack]{.underline} free carbonates at or near
the surface

\*\* calcareous soils [have]{.underline} free carbonates at or near the
surface