Problem #8 – Drainage Field Trip: Tracing Patterns across
an Upland Landscape
North Carolina State University, J.C. Raulston Arboretum,
Raleigh, NC
Soil Profile Drainage Descriptions:
Soil Profile #1
A-Horizon; 0 to 1 inches:
Very dark grayish brown (10 YR 3/2) fine
sandy loam.
BA-Horizon; 1 to 12 inches: Dark brown (7.5 YR
4/4) sandy loam and red (2.5 YR 5/8) mottles.
Bt1-Horizon; 12 to 23 inches: Red (2.5 YR 4/6)
clay and strong brown (7.5 YR 5/6) mottles.
Bt2-Horizon; 23 to 40 inches: Red (2.5 YR 4/8)
clay and dark reddish brown (2.5 YR 3/4) mottles.
BC-Horizon; 40 to 48 inches: Red 2.5 YR 4/6) clay
and pinkish white (5 YR 8/2) micaceous saprolite fragments.
C-Horizon; 48+ inches:
Pinkish white (5 YR 8/2) micaceous
saprolite and red (2.5 YR 4/6) mottles.
Soil Profile #2
A-Horizon; 0 to 8 inches: Very dark grayish brown (10 YR 3/2) fine sandy loam.
BA-Horizon; 8 to 14 inches: Dark yellowish brown (10 YR 4/4) clay loam and dark gray
(10 YR 4/1) mottles.
Bt1-Horizon; 14 to 18 inches: Yellowish brown (10 YR 5/8) clay and red (2.5 YR 4/8)
mottles.
Bt2-Hoizon; 18 to 26 inches: Yellowish brown (10 YR 5/6) clay and red (2.5 YR 4/8)
mottles.
Bt3-Hoizon; 26 to 40 inches: Red (2.5 YR 4/6) clay and yellowish brown (10 YR 5/6)
mottles.
BC-Horizon; 40+ inches: Red (2.5 YR 4/6) clay.
Soil Profile #3
A-Horizon; 0 to 2 inches: Dark grayish brown (10 YR 4/2) fine sandy loam.
AB-Horizon; 2 to 6 inches: Dark grayish brown (10 YR 4/2) sandy loam and yellowish
red
(5 YR 5/6) mottles.
Bt1-Horizon; 6 to 14 inches: Dark yellowish brown (10 YR 4/4) clay, and dark brown
(10 YR 4/3) and red (2.5 YR 4/8)
mottles.
Bt2-Horizon; 14 to 17 inches: Yellowish brown (10 YR 5/8) clay and red (2.5 YR 4/8)
mottles.
Bt3-Hoizon; 17 to 25 inches: Yellowish brown (10 YR 5/6) clay, and brownish yellow
(10 YR 6/8) and red (2.5 YR 4/8)
mottles.
BC-Horizon; 25 to 40+ inches: Yellowish brown (10 YR 5/6) clay loam, and brownish
yellow (10 YR 6/8) and red (2.5 YR 4/8) mottles.
Soil Profile #4
Ag-Horizon; 0 to 8 inches: Very dark gray (10 YR 3/1) loam.
ABg-Horizon; 8 to 25 inches: Dark grayish brown (10 YR 4/2) sandy loam and very dark
gray
(10 YR 3/1) mottles.
Btg1-Horizon; 25 to 27 inches: Yellowish brown (10 YR 5/8) clay and very dark grayish
brown (10 YR 3/2) mottles; and hydrogen sulfide (rotten egg) odor.
Bt2-Horizon: 27 to 40+ inches: Yellowish brown (10 YR 5/8) clay and brown (10 YR 5/3)
mottles.