ptfkit.lal1979¶
import ptfkit.lal1979;
Exported namespace: ptfkit::lal1979
Moisture retention and plasticity regressions for two groups of Nigerian soils.
Source¶
Lal, R. (1979). Physical properties and moisture retention characteristics of some Nigerian soils. Geoderma, 21, 209-223.
DOI: 10.1016/0016-7061(78)90028-9
Scope¶
Territory: Nigeria
Dataset: 119 genetic-horizon samples from 23 profiles in two parent-material groups.
Functions¶
calc_ptf_lal1979_group_i_water_0bar_from_clay¶
Estimate gravimetric moisture retention at saturation for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_0bar_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at saturation expressed per unit dry soil mass. (g g⁻¹)
Note
Table IV, Group I, clay predictor, water_0bar response.
calc_ptf_lal1979_group_i_water_0bar_from_sand¶
Estimate gravimetric moisture retention at saturation for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_0bar_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at saturation expressed per unit dry soil mass. (g g⁻¹)
Note
Table IV, Group I, sand predictor, water_0bar response.
calc_ptf_lal1979_group_ii_water_0bar_from_clay¶
Estimate gravimetric moisture retention at saturation for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_0bar_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at saturation expressed per unit dry soil mass. (g g⁻¹)
Note
Table IV, Group II, clay predictor, water_0bar response.
calc_ptf_lal1979_group_ii_water_0bar_from_sand¶
Estimate gravimetric moisture retention at saturation for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_0bar_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at saturation expressed per unit dry soil mass. (g g⁻¹)
Note
Table IV, Group II, sand predictor, water_0bar response.
calc_ptf_lal1979_group_i_water_01bar_from_clay¶
Estimate gravimetric moisture retention at 0.1 bar suction for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_01bar_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table V, Group I, clay predictor, water_01bar response.
calc_ptf_lal1979_group_i_water_03bar_from_clay¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_03bar_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table V, Group I, clay predictor, water_03bar response.
calc_ptf_lal1979_group_i_water_01bar_from_sand¶
Estimate gravimetric moisture retention at 0.1 bar suction for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_01bar_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table V, Group I, sand predictor, water_01bar response.
calc_ptf_lal1979_group_i_water_03bar_from_sand¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_03bar_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table V, Group I, sand predictor, water_03bar response.
calc_ptf_lal1979_group_ii_water_01bar_from_clay¶
Estimate gravimetric moisture retention at 0.1 bar suction for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_01bar_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table V, Group II, clay predictor, water_01bar response.
calc_ptf_lal1979_group_ii_water_03bar_from_clay¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_03bar_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table V, Group II, clay predictor, water_03bar response.
calc_ptf_lal1979_group_ii_water_01bar_from_sand¶
Estimate gravimetric moisture retention at 0.1 bar suction for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_01bar_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table V, Group II, sand predictor, water_01bar response.
calc_ptf_lal1979_group_ii_water_03bar_from_sand¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_03bar_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table V, Group II, sand predictor, water_03bar response.
calc_ptf_lal1979_group_i_water_15bar_from_clay¶
Estimate gravimetric moisture retention at 15 bar suction for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_15bar_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table VI, Group I, clay predictor, water_15bar response.
calc_ptf_lal1979_group_i_water_15bar_from_sand¶
Estimate gravimetric moisture retention at 15 bar suction for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_15bar_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table VI, Group I, sand predictor, water_15bar response.
calc_ptf_lal1979_group_i_water_15bar_from_silt¶
Estimate gravimetric moisture retention at 15 bar suction for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_water_15bar_from_silt(double silt)
Parameters¶
| Name | Description |
|---|---|
silt | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table VI, Group I, silt predictor, water_15bar response.
calc_ptf_lal1979_group_ii_water_15bar_from_clay¶
Estimate gravimetric moisture retention at 15 bar suction for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_15bar_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table VI, Group II, clay predictor, water_15bar response.
calc_ptf_lal1979_group_ii_water_15bar_from_sand¶
Estimate gravimetric moisture retention at 15 bar suction for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_15bar_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table VI, Group II, sand predictor, water_15bar response.
calc_ptf_lal1979_group_i_moisture_equivalent_from_clay¶
Estimate gravimetric moisture equivalent measured at 1000 times gravity for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_moisture_equivalent_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. (g g⁻¹)
Note
Table VII, Group I, clay predictor, moisture_equivalent response.
calc_ptf_lal1979_group_i_moisture_equivalent_from_sand¶
Estimate gravimetric moisture equivalent measured at 1000 times gravity for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_moisture_equivalent_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. (g g⁻¹)
Note
Table VII, Group I, sand predictor, moisture_equivalent response.
calc_ptf_lal1979_group_ii_moisture_equivalent_from_clay¶
Estimate gravimetric moisture equivalent measured at 1000 times gravity for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_moisture_equivalent_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. (g g⁻¹)
Note
Table VII, Group II, clay predictor, moisture_equivalent response.
calc_ptf_lal1979_group_ii_moisture_equivalent_from_sand¶
Estimate gravimetric moisture equivalent measured at 1000 times gravity for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_moisture_equivalent_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. (g g⁻¹)
Note
Table VII, Group II, sand predictor, moisture_equivalent response.
calc_ptf_lal1979_group_ii_moisture_equivalent_from_silt¶
Estimate gravimetric moisture equivalent measured at 1000 times gravity for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_moisture_equivalent_from_silt(double silt)
Parameters¶
| Name | Description |
|---|---|
silt | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. (g g⁻¹)
Note
Table VII, Group II, silt predictor, moisture_equivalent response.
calc_ptf_lal1979_group_ii_water_03bar_from_water_01bar¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_03bar_from_water_01bar(double water_01bar)
Parameters¶
| Name | Description |
|---|---|
water_01bar | Gravimetric moisture retention at 0.1 bar suction on disturbed soil. (g/g) |
Returns¶
Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table VIII, Group II, water_01bar predictor, water_03bar response.
calc_ptf_lal1979_group_ii_water_15bar_from_water_01bar¶
Estimate gravimetric moisture retention at 15 bar suction for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_water_15bar_from_water_01bar(double water_01bar)
Parameters¶
| Name | Description |
|---|---|
water_01bar | Gravimetric moisture retention at 0.1 bar suction on disturbed soil. (g/g) |
Returns¶
Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. (g g⁻¹)
Note
Table VIII, Group II, water_01bar predictor, water_15bar response.
calc_ptf_lal1979_group_i_upper_plastic_limit_from_organic_carbon¶
Estimate upper plastic limit for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_upper_plastic_limit_from_organic_carbon(double organic_carbon)
Parameters¶
| Name | Description |
|---|---|
organic_carbon | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Upper plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group I, organic_carbon predictor, upper_plastic_limit response.
calc_ptf_lal1979_group_i_lower_plastic_limit_from_organic_carbon¶
Estimate lower plastic limit for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_lower_plastic_limit_from_organic_carbon(double organic_carbon)
Parameters¶
| Name | Description |
|---|---|
organic_carbon | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Lower plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group I, organic_carbon predictor, lower_plastic_limit response.
calc_ptf_lal1979_group_i_plasticity_index_from_organic_carbon¶
Estimate plasticity index (upper minus lower plastic limit) for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_plasticity_index_from_organic_carbon(double organic_carbon)
Parameters¶
| Name | Description |
|---|---|
organic_carbon | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Plasticity index (upper minus lower plastic limit) expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group I, organic_carbon predictor, plasticity_index response.
calc_ptf_lal1979_group_i_upper_plastic_limit_from_clay¶
Estimate upper plastic limit for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_upper_plastic_limit_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Upper plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group I, clay predictor, upper_plastic_limit response.
calc_ptf_lal1979_group_i_lower_plastic_limit_from_clay¶
Estimate lower plastic limit for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_lower_plastic_limit_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Lower plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group I, clay predictor, lower_plastic_limit response.
calc_ptf_lal1979_group_i_plasticity_index_from_clay¶
Estimate plasticity index (upper minus lower plastic limit) for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_plasticity_index_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Plasticity index (upper minus lower plastic limit) expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group I, clay predictor, plasticity_index response.
calc_ptf_lal1979_group_i_lower_plastic_limit_from_sand¶
Estimate lower plastic limit for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_lower_plastic_limit_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Lower plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group I, sand predictor, lower_plastic_limit response.
calc_ptf_lal1979_group_i_plasticity_index_from_sand¶
Estimate plasticity index (upper minus lower plastic limit) for Group I.
[[nodiscard]]
inline double calc_ptf_lal1979_group_i_plasticity_index_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Plasticity index (upper minus lower plastic limit) expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group I, sand predictor, plasticity_index response.
calc_ptf_lal1979_group_ii_upper_plastic_limit_from_organic_carbon¶
Estimate upper plastic limit for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_upper_plastic_limit_from_organic_carbon(double organic_carbon)
Parameters¶
| Name | Description |
|---|---|
organic_carbon | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Upper plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, organic_carbon predictor, upper_plastic_limit response.
calc_ptf_lal1979_group_ii_plasticity_index_from_organic_carbon¶
Estimate plasticity index (upper minus lower plastic limit) for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_plasticity_index_from_organic_carbon(double organic_carbon)
Parameters¶
| Name | Description |
|---|---|
organic_carbon | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Plasticity index (upper minus lower plastic limit) expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, organic_carbon predictor, plasticity_index response.
calc_ptf_lal1979_group_ii_upper_plastic_limit_from_clay¶
Estimate upper plastic limit for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_upper_plastic_limit_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Upper plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, clay predictor, upper_plastic_limit response.
calc_ptf_lal1979_group_ii_lower_plastic_limit_from_clay¶
Estimate lower plastic limit for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_lower_plastic_limit_from_clay(double clay)
Parameters¶
| Name | Description |
|---|---|
clay | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Lower plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, clay predictor, lower_plastic_limit response.
calc_ptf_lal1979_group_ii_upper_plastic_limit_from_sand¶
Estimate upper plastic limit for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_upper_plastic_limit_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Upper plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, sand predictor, upper_plastic_limit response.
calc_ptf_lal1979_group_ii_lower_plastic_limit_from_sand¶
Estimate lower plastic limit for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_lower_plastic_limit_from_sand(double sand)
Parameters¶
| Name | Description |
|---|---|
sand | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Lower plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, sand predictor, lower_plastic_limit response.
calc_ptf_lal1979_group_ii_upper_plastic_limit_from_silt¶
Estimate upper plastic limit for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_upper_plastic_limit_from_silt(double silt)
Parameters¶
| Name | Description |
|---|---|
silt | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Upper plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, silt predictor, upper_plastic_limit response.
calc_ptf_lal1979_group_ii_lower_plastic_limit_from_silt¶
Estimate lower plastic limit for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_lower_plastic_limit_from_silt(double silt)
Parameters¶
| Name | Description |
|---|---|
silt | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Lower plastic limit expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, silt predictor, lower_plastic_limit response.
calc_ptf_lal1979_group_ii_plasticity_index_from_silt¶
Estimate plasticity index (upper minus lower plastic limit) for Group II.
[[nodiscard]]
inline double calc_ptf_lal1979_group_ii_plasticity_index_from_silt(double silt)
Parameters¶
| Name | Description |
|---|---|
silt | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. (%) |
Returns¶
Plasticity index (upper minus lower plastic limit) expressed as percentage of oven-dry soil mass. (%)
Note
Table IX, Group II, silt predictor, plasticity_index response.