Horizon | Depth (cm.) | Description |
---|---|---|
Aoo | (0-2.5.) | Dark brown partly decomposed needles, twigs, moss dead wood, etc. |
Ao | (2.5-5) | Black well decomposed organic matter. Numerous small feeding roots. |
A1 | (5-7.5) | Black friable mixture of organic matter and mineral soil. Small granular structure. pH 4.61. |
A2 | (7.5-17.5) | Light gray clay. Wheat size granules which get larger with deep adherence to one another. pH 5.10. |
A3 | (17.5-25) | Light gray clay. Fragmentary structure 1/4-inch in diameter at top, increasing to 3/4-inch diameter in lower part. Heavier than A2, with the appearanace of being leached. pH 5.12. |
B1 | (25-45) | Brown heavy clay, with slightly reddish tinge. Large fragmentary structure and heavies texture of any horizon. Cracks vertically on drying. pH 5.19. |
B2 | (45-55) | Heavy clay but not as heavy as B1. Light gray broken laminations alternating with dark ones. No evidence of accumulated lime. pH 6.25. |
C | Heavy varved clay, with thin horizontal cleavage. Alternation of light and dark layers to grayish brown. pH 7.56. |
Horizon | Depth
cm. |
Ignition
Loss % |
Organic
Carbon % |
O.M.
% |
Exchangable | Easily Soluble
P2O5 ppm |
pH | ||
---|---|---|---|---|---|---|---|---|---|
CaO
% |
MgO
% |
K2O
% |
|||||||
Ao | 2.5-5 | 88.00 | - | - | - | - | - | - | - |
A1 | 5-7.5 | 34.40 | 17.08 | 29.42 | 0.21 | 0.084 | 0.064 | 61 | 4.61 |
A2 | 7.5-17.5 | 11.83 | 4.05 | 7.05 | 0.18 | 0.082 | 0.060 | 32 | 5.10 |
A3 | 17.5-25 | 8.18 | 2.16 | 3.72 | 0.15 | 0.084 | 0.053 | 28 | 5.12 |
B1 | 25-45 | 6.54 | 1.29 | 2.22 | 0.22 | 0.081 | 0.038 | 35 | 5.19 |
B2 | 45-55 | 3.79 | 0.32 | 0.55 | 0.29 | 0.078 | 0.034 | 1,585 | 6.25 |
C | 55+ | 3.89 | 0.22 | 0.38 | 0.28 | 0.082 | 0.028 | 1,616 | 7.56 |
Horizon | Depth
cm. |
N
% |
SiO2
% |
Al2O3
% |
Fe2O3
% |
CaO
% |
MgO
% |
K2O
% |
Na2O
% |
Co
ppm |
P 2O5
% |
---|---|---|---|---|---|---|---|---|---|---|---|
Ao | 2.5-5 | - | - | - | - | - | - | - | - | - | - |
A1 | 5-7.5 | 0.63 | 36.05 | 16.70 | 8.47 | 3.31 | 2.10 | 1.61 | 1.55 | 41 | 0.27 |
A2 | 7.5-17.5 | 0.31 | 50.00 | 21.15 | 11.71 | 3.60 | 2.82 | 2.00 | 1.48 | 50 | 0.28 |
A3 | 17.5-25 | 0.20 | 53.39 | 20.88 | 11.86 | 3.46 | 2.45 | 2.03 | 0.94 | 25 | 0.20 |
B1 | 25-45 | 0.13 | 55.15 | 22.31 | 10.54 | 2.77 | 2.80 | 1.93 | 0.71 | - | 0.15 |
B2 | 45-55 | 0.04 | 58.89 | 21.98 | 9.52 | 2.28 | 3.66 | 1.94 | 0.88 | - | 0.18 |
C | 55+ | 0.04 | 57.59 | 22.17 | 9.85 | 2.07 | 3.73 | 2.11 | 0.82 | - | 0.20 |
Horizon | Depth (cm.) | Description |
---|---|---|
Aoo | (0-1.25) | Dark brown partly decomposed needles, twigs, moss, dead wood, etc. |
Ao | (1.25-3.75) | Dark brown well decomposed organic matter, with a large number of small feeding roots. |
A1 | (3.75-6.25) | Black friable Mixture of organic matter and mineral soil. Small granular structure, some of the granules having a soft core of concretionary iron. pH 4.55. |
A2 | (6.25-27.5) | Ashy gray clay with small granular structure at the top, becoming platy in the center of horizon and platy-granular combination in the lower part. The granules increase in size with depth, some having a core of concretionary iron. pH 5.31. |
A3 | (27.5-35) | Light gray clay with slight yellowish tinge when damp. Small fragmentary structure. More compact and heavier than horizon above. pH 5.01. |
B1 | (35-41.25) | Brownish yellow clay, the color being from concretionary iron particles with brownish centers and yellowish fringes on a gray background. Fragmentary structure and vertical cracking, the fragments being one inch in diameter capable of breaking down into small ones of the same shape. pH 5.52. |
B2 | (41.25-53.75) | Grayish brown clay with iron accumulation and fragmentary structure 1 1/2 inches in diameter. Compact and heaviest horizons in profile. pH 5.80. |
B3 | (53.75-73.75) | Clay with horizontal layering and some evidence of broken lamination. Alternating brown and light gray layers about 1/2-inch thick. Partly weathered parent material, compact and heavy. pH 6.40. |
C | Heavy varved clay with alternation of gray and dark brown layers. Main horizontal cleavage is about 1/2-inch apart. pH 6.55. |
Horizon | Depth
cm. |
Ignition
Loss % |
Organic
Carbon % |
O.M.
% |
Exchangable | Easily Soluble
P2O5 ppm |
pH | ||
---|---|---|---|---|---|---|---|---|---|
CaO
% |
MgO
% |
K2O
% |
|||||||
Ao | 1.25-3.75 | 83.24 | - | - | - | - | - | - | - |
A1 | 3.75-6.25 | 22.85 | 13.85 | 23.87 | 0.31 | 0.082 | 0.045 | 127 | 4.55 |
A2 | 6.25-27.5 | 4.00 | 1.33 | 2.29 | 0.12 | 0.040 | 0.020 | 308 | 5.31 |
A3 | 27.5-35 | 3.01 | 0.66 | 1.13 | 0.11 | 0.048 | 0.020 | 476 | 5.01 |
B1 | 35-41.25 | 4.17 | 0.38 | 0.65 | 0.32 | 0.084 | 0.031 | 264 | 5.52 |
B2 | 41.25-53.75 | 4.15 | 0.39 | 0.65 | 0.42 | 0.092 | 0.030 | 544 | 5.80 |
B3 | 53.75-73.75 | 4.05 | 0.37 | 0.63 | 0.46 | 0.085 | 0.028 | 926 | 6.40 |
C | 3.67 | - | - | 0.46 | 0.083 | 0.094 | 1,189 | 6.55 |
Horizon | Depth
cm. |
N
% |
SiO2
% |
Al2O3
% |
Fe2O3
% |
CaO
% |
MgO
% |
K2O
% |
Na2O
% |
Co
ppm |
P 2O5
% |
---|---|---|---|---|---|---|---|---|---|---|---|
Ao | 1.25-3.75 | - | - | - | - | - | - | - | - | - | - |
A1 | 3.75-6.25 | 0.52 | 46.89 | 13.78 | 8.36 | 2.69 | 2.26 | 1.37 | 0.75 | 21 | 0.31 |
A2 | 6.25-27.5 | 0.09 | 67.73 | 15.66 | 7.41 | 2.37 | 2.26 | 1.65 | 0.83 | 18 | 0.30 |
A3 | 27.5-35 | 0.07 | 65.90 | 16.12 | 9.02 | 2.59 | 2.46 | 1.82 | 1.03 | 14 | 0.27 |
B1 | 35-41.25 | 0.06 | 60.64 | 20.43 | 9.85 | 1.96 | 2.81 | 2.08 | 0.85 | - | 0.12 |
B2 | 41.25-53.75 | 0.06 | 58.94 | 20.00 | 10.14 | 2.75 | 2.84 | 1.98 | 0.91 | - | 0.11 |
B3 | 53.75-73.75 | 0.05 | 58.49 | 20.15 | 9.82 | 3.10 | 2.84 | 2.22 | 0.86 | - | 0.13 |
C | - | - | - | - | - | - | 1.65 | 0.95 | - | 0.15 |