| Soil
Property Code |
Soil
Property |
AttributeDescription |
PredictionMethod |
Units |
| BDw |
Bulk
Density - Whole Earth |
Bulk
Density of the whole soil (including coarse fragments) in
mass per unit volume by a method equivalent to the core
method |
Multiple
linear regression (Cubist) with kriging of residuals |
g/cm3 |
| BDf |
Bulk
Density - Fine Earth |
Bulk
Density of the fine earth fraction of the soil (< 2 mm)
in mass per unit volume by a method equivalent to the core
method |
Multiple
linear regression (Cubist) with kriging of residuals |
g/cm3 |
| SOC |
Organic
Carbon |
mass
fraction of carbon by weight in the < 2 mm soil
material as determined by dry combustion at 900° C |
|
% |
| CLY |
Clay |
< 2
um mass fraction of the < 2 mm soil material determined
using the pipette method |
Multiple
linear regression (Cubist) with kriging of residuals |
% |
| SLT |
Silt |
2-200
um mass fraction of the < 2 mm soil material determined
using the pipette method |
Multiple
linear regression (Cubist) with kriging of residuals |
% |
| SND |
Sand |
200 um
- 2 mm mass fraction of the < 2 mm soil material
determined using the pipette method |
Multiple
linear regression (Cubist) with kriging of residuals |
% |
| pHw |
pH -
Water |
1:5
soil/water |
|
None |
| pHc |
pH -
CaCl2 |
pH of
1:5 soil/0.01M calcium chloride extract |
Multiple
linear regression (Cubist) with kriging of residuals |
None |
| AWC |
Available
Water Capacity |
Available
water capacity computed for each of the specified depth
increments |
|
% |
| NTO |
Total
Nitrogen |
Total
nitrogen |
Multiple
linear regression (Cubist) with kriging of residuals |
% |
| PTO |
Total
Phosphorus |
Total
phosphorus |
Multiple
linear regression (Cubist) with kriging of residuals |
% |
| ECD |
Electrical
Conductivity |
Electrical
conductivity in 1:5 water-soil solution |
|
dS/m |
| CEC |
Cation
Exchange Capacity |
Cations
extracted using barium chloride (BaCl2) |
|
meq/100g |
| ECE |
Effective
Cation Exchange Capacity |
Cations
extracted using barium chloride (BaCl2) plus exchangeable
H + Al |
|
meq/100g |
| DER |
Depth
to Rock |
Depth
in cm to a lithic or paralithic contact as defined in USDA
Soil Survey Manual. If depth is < 200 cm record actual
depth in cm. If depth is > 200 cm record actual depth
if known. If not known exactly, record depth as 999 cm |
|
cm |
| DES |
Depth
of Soil |
Depth
of soil profile (A & B horizons) |
|
cm |
| DPE |
Plant
Exploitable (effective) Depth |
Effective
depth in cm as defined in the USDA Soil Survey Manual. The
lower limit of soil is normally the lower limit of
biologic activity, which generally coincides with the
common rooting depth of native perennial plants. This
depth is where root penetration is strongly inhibited
because of physical (including soil moisture or
temperature) and/or chemical characteristics. |
|
cm |
| CFG |
Coarse
Fragments |
mass
fraction of the soil material > 2 mm |
|
% |