**(A)** P R I M A R Y C H A R A C T E R I Z A T I O N D A T A

S74-Ark-121-6-(1-8), 74RO06 (RANDOLF COUNTY, ARKANSAS) SOIL
CHARACTERIZATION LABORATORY

AGRONOMY DEPARTMENT

SAMPLED AS: GEPP UNIVERSITY OF ARKANSAS

REVISED TO: FAYETTEVILLE, ARKANSAS 72701

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(- - -TOTAL - - -) (- - - - -SILT- - - - - -) (- - - - - -SAND- - - - -
) (TEXTURE)

CLAY SILT SAND FINE MEDIUM COARSE VF F M C VC

SAMPLE DEPTH HORIZON LT .002 .05 .002 .005 .02 .05 .10 .25 .5 1

NO. (IN) .002 -.05 -2 -.005 -.02 -.05 -.10 -.25 -.50 -1 -2

\<- - - - - - - - - - - - - -PCT OF \<2MM (3A1)- - - - - - - - - - - - -
-\>

none **½-0** **O1**

7875 **0- 1** **A1** **11.7 70.6 17.7** 9.9 28.9 31.8 5.8 4.9 2.5 3.3
1.2 sil

7876 **1- 7** **A2** **14.2 63.3 22.5** 12.1 31.7 19.5 9.2 5.0 3.4 2.8
2.1 sil

7877 **7-13** **A&B** **26.5 56.5 17.0** 12.3 25.7 18.5 6.8 4.1 2.7 1.8
1.6 sil

7878 **13-28** **B21T** **70.2 24.4 5.4** 8.3 8.6 7.5 2.8 1.0 0.6 0.7
0.3 c

7879 **28-41** **B22T** **76.5 19.5 4.0** 4.5 8.2 6.8 1.5 0.8 0.5 0.7
0.5 c

7880 **41-53** **B22T** **76.5 19.4 4.4** 5.5 6.8 7.1 1.4 1.0 0.5 0.9
0.6 c

7881 **53-63** **B3T** **83.1 13.8 3.1** 3.0 6.1 4.7 1.0 0.6 0.3 0.7 0.5
c

7882 **63-72** **B3T** **82.3 13.6 4.1** 0.4 8.0 5.2 1.5 0.7 0.6 0.8 0.5
c

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ORGN (- BULK DENSITY -) (- - - NH4OAC EXTRACTABLE BASES- - - -) ACID-
BASE (- - - -PH - - -)

M FIELD 1/3 OVEN CA MG NA K SUM ITY -SAT KCL CACL2 H2O

DEPTH MOIST BAR DRY NH4OAC IN .01M

(IN) 6A1c 4A3a 4A1d 4A1h 5B5a 5B5a 5B5a 5B5a 5c3 6H5a 5C1 8C1g 8C1f 8C1f

PCT \<- - - G/CC- - -\> \<- - - - - - - - - - - MEQ / 100 G- - - - - -
-\> PCT 1:2 1:1

½-0 - - - - - - - - -

0- 1 **1.50** 7.5 1.2 0.2 0.3 9.2 12.2 43 6.3

1- 7 **0.30** 1.2 0.2 0.2 0.2 1.8 7.2 20 5.4

7-13 **0.20** 1.0 0.4 0.2 0.2 1.8 6.2 23 5.3

13-28 **0.10** 2.6 3.0 0.2 0.3 6.1 15.9 28 5.1

28-41 **0.10** 2.4 3.5 0.2 0.4 6.5 19.8 25 5.0

41-53 **0.10** 2.0 3.7 0.2 0.4 6.3 18.0 26 5.0

53-63 **0.10** 1.9 3.2 0.2 0.4 5.7 22.6 20 5.1

63-72 **0.10** 1.9 3.2 0.2 0.4 5.7 22.5 20 5.1

**(B)** N A R R A T I V E P E D O N D E S C R I P T I O N

Pedon: Gepp Soil Survey Number S74-Ark-121-6-(1-8), 74RO06 Location:
SESESW,S11,T21N,R03W

Latitude: \_\_\_\_ Longitude: \_\_\_\_ Physiography: \_\_\_\_ Geomorphic
Position: \_\_\_\_ Microrelief:\_\_\_\_

Erosion or Deposition: \_\_\_\_ Slope: 12-20% Elevation:\_\_\_\_
Precipitation:\_\_\_\_ MLRA: N/A Water Table Depth:\_\_\_\_

Permeability: \_\_\_\_ Air Temperature:\_\_\_\_ Drainage: \_\_\_\_ Land
Use: wooded Stoniness:\_\_\_\_ Runoff: \_\_\_\_

Particle Size Control Section: \_\_\_\_ Parent Material:\_\_\_\_
Classification: \_\_\_\_ Diagnostic Horizons: \_\_\_\_

Described by: Brown and McFadden Sample Date: \_\_\_\_

O1 -- partly decomposed orgnic matter; not sampled

A1 \-- 0 to 1 in; dark grayish brown cherty (50%) silt loam; weak fine
granular structure; very friable; common fine and medium roots; few worm
holes and castings; pH 6.0; abrupt smooth boundary. 7875

A2 \-- 1 to 7 in; yellowish brown (10YR 5/4) cherty (40%) silt loam;
weak medium subangular blocky structure; friable; common fine and medium
roots; few worm holes; few pores; pH 5.5; clear,wavy boundary. 7876

A&B --- 7 to 13 in; yellowish red (5YR 4/8) silty clay loam; streaks of
yellowish brown (10YR 5/4) and (10YR 5/6) silt loam; weak medium
subangular blocky structure; friable; about 10% chert fragments from 1/8
in to 3 in in diameter; few fine and few medium roots; few pores; pH5.0;
clear smooth boundary. 7877

B21t --- 13 to 28 in; red (2.5YR 4/8) clay; moderate to strong medium
subangular blocky structure breaking to strong fine angular blockky
structure; firm; continuous thin clay films on faces of peds; few (\<5%)
chert fragments; few roots; few pores; pH 4.5; gradual smooth boundary.
7878

B22t --- 28 to 53 in; red (2.5YR 4/8) clay; common fine and medium faint
red (10YR 4/8), yellowish red (5YR 4/8) and common medium distinct
strong brown (7.5YR 5/8) mottles; moderate to strong medium subangular
blocky structure; firm continuous thin clay films on faces of peds;
about 5% chert fragmments from ½ to 3 in diameter; few pores lined with
clay films; few medium roots; pH 5.0; gradual smooth boundary. 7879 (28
to 41 in), 7880 (41 to 53 in)

B3t -- 53 to 72 in; yellowish red (5YR 4/8) clay; common medium distinct
strong brown (7.5YR 5/8), common medium prominent red (10YR 4/6) and few
fine prominent light gray (10yR 7/1, 7/2) mottles; moderate to strong
subangular blocky structure breaking too strong fine angular blocky
structure; firm; continuous thin clay films; about 10% chert and
siltstone fragments up to 3 in diameter; pH 5.5. 7881 (53 to 63 in),
7882 (63 to 72 in)