Description
Return equivalent-sphere surface area and clod sphericity.
Soil bench and profile terms depend on geometry, reference origins, heat-capacity bases and sign conventions. A pressure, stress or strain is a limited measured/model quantity rather than a complete soil-strength, heat-transport or field-state assessment. Reference lines and physical coefficients are supplied rather than inferred.
Return equivalent-sphere surface area and clod sphericity.
When to use this tool
Use Seedbed Clod Sphericity Reference Term when checking the stated soil geometry, thermal, mechanical or measurement convention.
How to use the tool and how it works
- Enter volume, measuredSurface. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read equivalentSphereArea, sphericity. Use the output convention below.
Return equivalent-sphere surface area and clod sphericity. Require volume/measuredSurface > 0 and surface >= same-volume sphere area; equivalentArea = (36*pi)^(1/3)*volume^(2/3), sphericity = equivalent/measured.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| volume | Volume in the unit implied by the stated geometry; no implicit unit conversion. | Required. Finite number; strictly above 0. |
| measuredSurface | Measured Surface | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| equivalentSphereArea | Equivalent Sphere Area | Required. Finite number. |
| sphericity | Sphericity | Required. Finite number. |
{
"input": {
"volume": 1,
"measuredSurface": 6
},
"output": {
"equivalentSphereArea": 4.835975862049409,
"sphericity": 0.8059959770082349
}
}Limitations and assumptions
- This assumes compatible 3D area/volume and measured external surface; no segmentation, pore correction or soil-condition diagnosis is supplied.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use calibrated measurements and an appropriate complete soil/engineering model for material properties, field behavior or safe practical loading.
References
Similar or alternative tools
- Soil Surface Roughness One Profile Term
Return roughness residuals and RMS against a supplied reference line.
- Seedbed Roughness Reference Plane Offset
Subtract an explicit reference-plane height from a measured seedbed height without estimating a roughness statistic.