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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at saturation
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_0bar | g g⁻¹ | — | Gravimetric moisture retention at saturation expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at saturation
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_0bar | g g⁻¹ | — | Gravimetric moisture retention at saturation expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at saturation
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_0bar | g g⁻¹ | — | Gravimetric moisture retention at saturation expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at saturation
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_0bar | g g⁻¹ | — | Gravimetric moisture retention at saturation expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.1 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_01bar | g g⁻¹ | — | Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.3 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_03bar | g g⁻¹ | — | Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.1 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_01bar | g g⁻¹ | — | Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.3 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_03bar | g g⁻¹ | — | Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.1 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_01bar | g g⁻¹ | — | Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.3 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_03bar | g g⁻¹ | — | Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.1 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_01bar | g g⁻¹ | — | Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.3 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_03bar | g g⁻¹ | — | Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 15 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_15bar | g g⁻¹ | — | Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 15 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_15bar | g g⁻¹ | — | Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 15 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
silt | number | % | — | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_15bar | g g⁻¹ | — | Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 15 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_15bar | g g⁻¹ | — | Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 15 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_15bar | g g⁻¹ | — | Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture equivalent measured at 1000 times gravity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
moisture_equivalent | g g⁻¹ | — | Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture equivalent measured at 1000 times gravity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
moisture_equivalent | g g⁻¹ | — | Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture equivalent measured at 1000 times gravity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
moisture_equivalent | g g⁻¹ | — | Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture equivalent measured at 1000 times gravity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
moisture_equivalent | g g⁻¹ | — | Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture equivalent measured at 1000 times gravity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
silt | number | % | — | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
moisture_equivalent | g g⁻¹ | — | Gravimetric moisture equivalent measured at 1000 times gravity expressed per unit dry soil mass. |
Note
Table VII, Group II, silt predictor, moisture_equivalent response.
calc_ptf_lal1979_group_i_water_01bar_from_water_0bar¶
Estimate gravimetric moisture retention at 0.1 bar suction for Group I.
Status: blocked
Prediction target: Gravimetric moisture retention at 0.1 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_0bar | number | g/g | — | Gravimetric moisture retention at 0 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_01bar | g g⁻¹ | — | Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. |
Note
Table VIII, Group I, water_0bar predictor, water_01bar response.
Note
Printed regression slope m = 1.00; intercept b = 0.20.
Warning
Blocked: the printed dependent/independent labels and coefficients predict increasing water content with increasing suction. Confirm regression direction and intercept sign from authoritative evidence; no reversal or sign correction is assumed.
calc_ptf_lal1979_group_i_water_03bar_from_water_0bar¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group I.
Status: blocked
Prediction target: Gravimetric moisture retention at 0.3 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_0bar | number | g/g | — | Gravimetric moisture retention at 0 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_03bar | g g⁻¹ | — | Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. |
Note
Table VIII, Group I, water_0bar predictor, water_03bar response.
Note
Printed regression slope m = 1.05; intercept b = 0.22.
Warning
Blocked: the printed dependent/independent labels and coefficients predict increasing water content with increasing suction. Confirm regression direction and intercept sign from authoritative evidence; no reversal or sign correction is assumed.
calc_ptf_lal1979_group_i_water_15bar_from_water_0bar¶
Estimate gravimetric moisture retention at 15 bar suction for Group I.
Status: blocked
Prediction target: Gravimetric moisture retention at 15 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_0bar | number | g/g | — | Gravimetric moisture retention at 0 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_15bar | g g⁻¹ | — | Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. |
Note
Table VIII, Group I, water_0bar predictor, water_15bar response.
Note
Printed regression slope m = 1.19; intercept b = 0.28.
Warning
Blocked: the printed dependent/independent labels and coefficients predict increasing water content with increasing suction. Confirm regression direction and intercept sign from authoritative evidence; no reversal or sign correction is assumed.
calc_ptf_lal1979_group_i_water_03bar_from_water_01bar¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group I.
Status: blocked
Prediction target: Gravimetric moisture retention at 0.3 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_01bar | number | g/g | — | Gravimetric moisture retention at 0.1 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_03bar | g g⁻¹ | — | Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. |
Note
Table VIII, Group I, water_01bar predictor, water_03bar response.
Note
Printed regression slope m = 1.05; intercept b = 0.10.
Warning
Blocked: the printed dependent/independent labels and coefficients predict increasing water content with increasing suction. Confirm regression direction and intercept sign from authoritative evidence; no reversal or sign correction is assumed.
calc_ptf_lal1979_group_ii_water_01bar_from_water_0bar¶
Estimate gravimetric moisture retention at 0.1 bar suction for Group II.
Status: blocked
Prediction target: Gravimetric moisture retention at 0.1 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_0bar | number | g/g | — | Gravimetric moisture retention at 0 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_01bar | g g⁻¹ | — | Gravimetric moisture retention at 0.1 bar suction expressed per unit dry soil mass. |
Note
Table VIII, Group II, water_0bar predictor, water_01bar response.
Note
Printed regression slope m = 0.94; intercept b = 0.238.
Warning
Blocked: the printed dependent/independent labels and coefficients predict increasing water content with increasing suction. Confirm regression direction and intercept sign from authoritative evidence; no reversal or sign correction is assumed.
calc_ptf_lal1979_group_ii_water_03bar_from_water_0bar¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group II.
Status: blocked
Prediction target: Gravimetric moisture retention at 0.3 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_0bar | number | g/g | — | Gravimetric moisture retention at 0 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_03bar | g g⁻¹ | — | Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. |
Note
Table VIII, Group II, water_0bar predictor, water_03bar response.
Note
Printed regression slope m = 0.91; intercept b = 0.281.
Warning
Blocked: the printed dependent/independent labels and coefficients predict increasing water content with increasing suction. Confirm regression direction and intercept sign from authoritative evidence; no reversal or sign correction is assumed.
calc_ptf_lal1979_group_ii_water_15bar_from_water_0bar¶
Estimate gravimetric moisture retention at 15 bar suction for Group II.
Status: blocked
Prediction target: Gravimetric moisture retention at 15 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_0bar | number | g/g | — | Gravimetric moisture retention at 0 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_15bar | g g⁻¹ | — | Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. |
Note
Table VIII, Group II, water_0bar predictor, water_15bar response.
Note
Printed regression slope m = 1.45; intercept b = 0.277.
Warning
Blocked: the printed dependent/independent labels and coefficients predict increasing water content with increasing suction. Confirm regression direction and intercept sign from authoritative evidence; no reversal or sign correction is assumed.
calc_ptf_lal1979_group_ii_water_03bar_from_water_01bar¶
Estimate gravimetric moisture retention at 0.3 bar suction for Group II.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 0.3 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_01bar | number | g/g | — | Gravimetric moisture retention at 0.1 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_03bar | g g⁻¹ | — | Gravimetric moisture retention at 0.3 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Gravimetric moisture retention at 15 bar suction
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
water_01bar | number | g/g | — | Gravimetric moisture retention at 0.1 bar suction on disturbed soil. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
water_15bar | g g⁻¹ | — | Gravimetric moisture retention at 15 bar suction expressed per unit dry soil mass. |
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.
Status: ready-for-implementation
Prediction target: Upper plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
organic_carbon | number | % | — | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
upper_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Lower plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
organic_carbon | number | % | — | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
lower_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Plasticity index (upper minus lower plastic limit)
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
organic_carbon | number | % | — | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
plasticity_index | % | — | 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.
Status: ready-for-implementation
Prediction target: Upper plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
upper_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Lower plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
lower_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Plasticity index (upper minus lower plastic limit)
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
plasticity_index | % | — | 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_upper_plastic_limit_from_sand¶
Estimate upper plastic limit for Group I.
Status: blocked
Prediction target: Upper plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
upper_plastic_limit | % | — | Upper plastic limit expressed as percentage of oven-dry soil mass. |
Note
Table IX, Group I, sand predictor, upper_plastic_limit response.
Note
Printed regression slope m = -0.40; intercept b = -46.20.
Warning
Blocked: printed intercept -46.20 with slope -0.40 produces a negative upper plastic limit for nonnegative sand. Confirm the intercept sign; no correction is assumed.
calc_ptf_lal1979_group_i_lower_plastic_limit_from_sand¶
Estimate lower plastic limit for Group I.
Status: ready-for-implementation
Prediction target: Lower plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
lower_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Plasticity index (upper minus lower plastic limit)
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
plasticity_index | % | — | 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.
Status: ready-for-implementation
Prediction target: Upper plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
organic_carbon | number | % | — | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
upper_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Plasticity index (upper minus lower plastic limit)
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
organic_carbon | number | % | — | Organic carbon measured by Walkley and Black wet combustion; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
plasticity_index | % | — | 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.
Status: ready-for-implementation
Prediction target: Upper plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
upper_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Lower plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay smaller than 0.002 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
lower_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Upper plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
upper_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Lower plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand from 0.02 to 2 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
lower_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Upper plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
silt | number | % | — | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
upper_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Lower plastic limit
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
silt | number | % | — | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
lower_plastic_limit | % | — | 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.
Status: ready-for-implementation
Prediction target: Plasticity index (upper minus lower plastic limit)
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
silt | number | % | — | Silt from 0.002 to 0.02 mm; percentage of the fine earth. Full calibration bounds are not reported. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
plasticity_index | % | — | 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.