The Simcheon series are members of the fine silty, mixed, mesic family of Anthraquic Eutrudepts [Hydragric Anthrosols (Eutric Oxyaquic Siltic) classified by WRB]. These soils have dark grayish brown silt loam Ap horizons with brown mottles, brown silt loam BA horizons, brown and dark gray silty clay loam Bw horizons, and brown silty clay loam BC horizons with brown mottles. These soils are on broad alluvial plains derived from alluvial materials.

Typifying Pedon: Simcheon silt loam-paddy rice (Colors are for moist soil).

  Slope: 0-2%

  Elevation: 103 m above m.s.l.

  Soil moisture regime: Udic (Anthraquic)

  Soil temperature regime: Mesic

  Parent material: Alluvium

  Diagnostic features: An ochric epipedon from a depth of 0 to 22 cm and a cambic horizon from a depth of 46 to 78 cm (An anthraquic horizon from a depth of 0 to 46 cm and a hydragric horizon from a depth of 46 to 78 cm by WRB).

  Described by: Song, K. C., D. C. Noh, and B. K. Hyun,  27 March, 2013.

Morphological properties of typifying pedon.

Ap - 0 to 22 cm. Dark grayish brown (10YR 4/2) silt loam; common fine to medium distinct brown (7.5YR 4/4) mottles; structureless, puddled; sticky and plastic; common fine to medium roots; common fine to medium pores; common fine micas; few quartz grits; abrupt smooth boundary.

BA - 22 to 46 cm. Mottled, brown (7.5YR 4/2) and brown (7.5YR 4/4) silt loam; crushed color, brown (7.5YR 4/3); moderate medium to coarse platy structure; very firm, sticky and plastic; thick continuous clay cutans; few fine roots; common fine to medium pores; common very fine micas; gradual smooth boundary.

Bw - 46 to 78 cm. Mottled, brown (7.5YR 4/4), brown (7.5YR 4/3), dark gray (7.5YR 4/1), and brown (7.5YR 5/3) silty clay loam; crushed color, brown (7.5YR 4/3); moderate medium to coarse platy structure; very firm, very sticky and very plastic; thick continuous clay cutans; no roots; common fine to medium pores; common very fine micas; gradual wavy boundary.

BC - 78 to 150 cm. Brown (7.5YR 4/3) silty clay loam; common medium to coarse faint brown (7.5YR 4/2) mottles; moderate coarse prismatic structure; very firm, very sticky and very plastic; thick continuous clay cutans; common medium to coarse pores; common very fine micas.

  The typifying pedon has an ochric epipedon from a depth of 0 to 22 cm and a cambic horizon from a depth of 46 to 78 cm. That can be classified as Inceptisol. It is used for paddy field, but does not have aquic conditions for some time in normal years in a layer at a depth between 40 and 50 cm from the mineral soil surface. Therefore it can be classified as Udept. It has a base saturation (by NH4OAc) of 60% or more in one or more horizons at a depth between 25 and 75 cm from the mineral soil surface. That keys out as Eutrudept. It has anthraquic conditions and can be classified as Anthraquic Eutrudept.

  The typifying pedon has fine silty particle-size class and mesic soil temperature class. Therefore it can be classified as fine silty, mixed, mesic family of Anthraquic Eutrudept.

Type Location: About 800 meters north-east of Simcheon Middle School, Chogang Ri, Simcheon Myeon, Yeongdong Gun, Chungcheongbug Do (127^o 43' 16.5'', 36^o 13' 25.0'').

Range in Characteristics: These soils have ochric epipedons and cambic horizons. The solum thickness ranges from 100 to 150 cm and depth to hard rock is more than 5 meters. The reaction is neutral except Ap horizons. Base saturation is more than 60 percent. These soils have gray silt loam Ap horizons with yellowish brown or strong brown mottles; gray silt loam Bg horizons with yellowish brown or strong brown mottles and dark brown or brown silt loam C horizons.

Competing Series and Their Differentiae: These are the Gangjin, Yulgog, and Gyuam soils. The Gangjin soils occur on  local valleys derived from porphyry rocks. The Yulgog soils occur on  local valleys derived from limestone materials. The Gyuam soils are fine silty over coarse silty textures.

Setting: The Simcheon soils are on broad alluvial plains in alluvium from alluvial materials.  The slopes are less than 2 percent.

Principal Associated Soils: These are the Seogcheon, Nampyeong, Gyuam, and Pyeongtaeg soils in similar positions, and the Jungdong and Ihyeon soils in higher upland positions.

Drainage and Permeability: Moderately well drained; slow permeability; slow runoff.

Use and Vegetation: Used for rice.

Distribution and Extent: On the broad alluvial plains in Yeongdong Gun.

Series Established: Yeongdong Gun, Chungcheongbug Do, 1978. Revised, Yeongdong Gun, Chungcheongbug Do, 2013.

Laboratory data sheets of typifying pedon.

Depth (cm)	Horizon	( --- Total ---)			(-- Clay --)		(-- Silt --)		(------- Sand -------)
		Clay	Silt	Sand	Fine	Coarse	Fine	Coarse	VF	F	M	C	VC
		LT	.002	.05	LT	LT	.002	.02	.05	.10	.25	.5	1
		.002	- .05	- 2	.0002	.002	- .02	- .05	- .10	- .25	- .50	- 1	- 2
		- - - - - - - - - - - Pct of ˂ 2mm (3A1) - - - - - - - - - - -
0-22	Ap	21.2	51.7	27.1			32.5	19.2	7.0	5.9	5.1	6.8	2.3
22-46	BA	22.2	63.8	14.0			36.7	27.1	10.4	1.9	0.7	0.9	0.2
46-78	Bw	22.6	61.5	16.0			30.0	31.5	12.7	1.9	0.6	0.7	0
78-150	BC	22.8	58.8	18.4			24.7	34.1	15.2	2.4	0.5	0.2	0

Depth (cm)

Coarse Fractions(mm)

˃2mm

Orgn

Total

Extr

Total

(-- Dith -Cit --)

Weight

Wt

C

N

P

S

Extractable

2-5

5-20

20-75

.1-75

Pct of

Fe

Al

Mn

Whole

6A1c

6B3a

6S3

6R3a

6C2b

6G7a

6D2a

Pct of ˂ 75mm (3B1)

Soil

Pct ˂ 2mm

g/kg

Pct of ˂ 2mm

0-22

0.88

22-46

0.27

46-78

0.21

78-150

0.16

Depth (cm)

Ratio/Clay

Atterberg

( Bulk Density )

COLE

(- Water Content -)

WRD

CEC

1500

Limits

Field

33

Oven

Whole

Field

10

33

1500

Whole

kPa

LL

PI

Moist

kPa

Dry

Soil

Moist

kPa

kPa

kPa

Soil

8D1

8D1

4P1

4P

4A3a

4A1d

4A1h

4D1

4B4

4B1c

4B1c

4B2a

4C1

Pct ˂0.4mm

- - g/cc - -

cm/cm

-- Pct of ˂2mm --

cm/cm

0-22

0.56

1.32

27.6

22-46

0.69

1.60

21.8

46-78

0.52

1.56

23.8

78-150

0.50

Depth (cm)	( NH4OAc Extractable Bases )					Acid-	Extr	(----- CEC -----)			Al
	Ca	Mg	K	Na	Sum	ity	Al	Sum	NH4-	Bases	Sat
	5B5a	5B5a	5B5a	5B5a	Bases			Cats	OAc	+ Al
	6N2e	6O2d	6Q2b	6P2b		6H5a	6G9a	5A3a	5A8b	5A3b	5G1
	- - - - - - - - - - - - meq / 100g - - - - - - - - - - - -										Pct
0-22	6.7	1.2	0.4	0.1	8.4	2.6	0	13.0	11.9	8.4	0
22-46	8.0	2.5	0.6	0.2	11.3	5.7	0	17.0	15.3	11.3	0
46-78	7.7	3.3	0.5	0.2	11.8	5.3	0	17.1	11.7	11.8	0
78-150	6.2	3.4	0.6	0.2	10.3	7.2	0	17.5	11.4	10.3	0

Depth (cm)

(Base Sat)

CO3 as

Res

Cond

(------ pH ------)

Acid Oxalate Extraction

Sum

NH4-

CaCO3

NaF

KCl

CaCl2

H2O

Opt

Al

Fe

Si

OAc

˂2mm

.01M

Den

5C3

5C1

6E1g

8E1

8I

8C1d

8C1f

8C1f

8J

6G12

6C9a

6V2

---- Pct ----

ohms/cm

dS/m

1: 1

1: 2

1: 1

- Pct of ˂2mm -

0-22

64.6

71.3

4.7

5.4

5.8

22-46

66.5

73.7

5.7

6.9

7.5

46-78

68.9

100

5.2

6.5

7.0

78-150

58.8

90.1

4.7

6.0

6.6