Pidgeon (1972), available-water regressions for ferrallitic soils in Uganda.¶
Source¶
Pidgeon, J. D. (1972). The measurement and prediction of available water capacity of ferrallitic soils in Uganda. Journal of Soil Science, 23(4), 431-441.
Scope¶
Territory: Non-alluvial ferrallitic soils in Uganda, predominantly kaolinitic and possibly illitic
Dataset: Ugandan profile samples; Entebbe alluvial and Nabbongo montmorillonitic soils were excluded from the adopted regressions.
Functions¶
calc_ptf_pidgeon1972_fc¶
Estimate gravimetric field capacity from silt, clay, and organic matter.
Status: implemented
Prediction target: Gravimetric field capacity
Models: \(h(\theta)\) — Point estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
silt | number | % | — | Silt measured by particle-size method 2. |
clay | number | % | — | Clay measured by particle-size method 2. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
field_capacity | % w/w | — | Gravimetric field capacity. |
Note
The reviewed organic-matter coefficient is 1.54.
calc_ptf_pidgeon1972_fc_sand¶
Estimate gravimetric field capacity from sand.
Status: implemented
Prediction target: Gravimetric field capacity
Models: \(h(\theta)\) — Point estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand measured by particle-size method 2. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
field_capacity | % w/w | — | Gravimetric field capacity. |
calc_ptf_pidgeon1972_fc_sand_organic_matter¶
Estimate gravimetric field capacity from sand and organic matter.
Status: implemented
Prediction target: Gravimetric field capacity
Models: \(h(\theta)\) — Point estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand measured by particle-size method 2. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
field_capacity | % w/w | — | Gravimetric field capacity. |
calc_ptf_pidgeon1972_fc_vol_sand_organic_matter¶
Estimate volumetric field capacity from sand and organic matter.
Status: implemented
Prediction target: Volumetric field capacity
Models: \(h(\theta)\) — Point estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand measured by particle-size method 2. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
field_capacity | % v/v | — | Volumetric field capacity. |
calc_ptf_pidgeon1972_pwp¶
Estimate permanent wilting point from silt, clay, and organic matter.
Status: implemented
Prediction target: Gravimetric permanent wilting point
Models: \(h(\theta)\) — Point estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
silt | number | % | — | Silt measured by particle-size method 2. |
clay | number | % | — | Clay measured by particle-size method 2. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
permanent_wilting_point | % w/w | — | Permanent wilting point. |
calc_ptf_pidgeon1972_pwp_sand¶
Estimate permanent wilting point from sand.
Status: implemented
Prediction target: Gravimetric permanent wilting point
Models: \(h(\theta)\) — Point estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand measured by particle-size method 1. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
permanent_wilting_point | % w/w | — | Permanent wilting point. |
calc_ptf_pidgeon1972_pwp_sand_organic_matter¶
Estimate permanent wilting point from sand and organic matter.
Status: implemented
Prediction target: Gravimetric permanent wilting point
Models: \(h(\theta)\) — Point estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand measured by particle-size method 2. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
permanent_wilting_point | % w/w | — | Permanent wilting point. |
calc_ptf_pidgeon1972_awc¶
Estimate available water capacity from clay and organic matter.
Status: implemented
Prediction target: Available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
clay | number | % | — | Clay measured by particle-size method 1. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
available_water_capacity | mm/m | — | Available water capacity. |
calc_ptf_pidgeon1972_awc_sand_organic_matter¶
Estimate available water capacity from sand and organic matter.
Status: implemented
Prediction target: Available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand measured by particle-size method 2. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
available_water_capacity | mm/m | — | Available water capacity. |
calc_ptf_pidgeon1972_awc_coarse_sand¶
Estimate available water capacity from coarse sand.
Status: implemented
Prediction target: Available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
coarse_sand | number | % | — | Coarse sand measured by particle-size method 1. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
available_water_capacity | mm/m | — | Available water capacity. |
calc_ptf_pidgeon1972_awc_fine_sand¶
Estimate available water capacity from fine sand.
Status: implemented
Prediction target: Available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
fine_sand | number | % | — | Fine sand measured by particle-size method 1. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
available_water_capacity | mm/m | — | Available water capacity. |
calc_ptf_pidgeon1972_awc_very_fine_sand¶
Estimate available water capacity from very fine sand.
Status: implemented
Prediction target: Available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
very_fine_sand | number | % | — | Very fine sand measured by particle-size method 1. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
available_water_capacity | mm/m | — | Available water capacity. |
calc_ptf_pidgeon1972_eawc¶
Estimate extended available water capacity from silt, clay, and organic matter.
Status: implemented
Prediction target: Extended available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
silt | number | % | — | Silt measured by particle-size method 2. |
clay | number | % | — | Clay measured by particle-size method 2. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
extended_available_water_capacity | mm/m | — | Extended available water capacity. |
calc_ptf_pidgeon1972_eawc_sand¶
Estimate extended available water capacity from sand.
Status: implemented
Prediction target: Extended available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand measured by particle-size method 2. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
extended_available_water_capacity | mm/m | — | Extended available water capacity. |
calc_ptf_pidgeon1972_eawc_sand_organic_matter¶
Estimate extended available water capacity from sand and organic matter.
Status: implemented
Prediction target: Extended available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
sand | number | % | — | Sand measured by particle-size method 1. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
extended_available_water_capacity | mm/m | — | Extended available water capacity. |
calc_ptf_pidgeon1972_eawc_coarse_sand_organic_matter¶
Estimate extended available water capacity from coarse sand and organic matter.
Status: implemented
Prediction target: Extended available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
coarse_sand | number | % | — | Coarse sand measured by particle-size method 1. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
extended_available_water_capacity | mm/m | — | Extended available water capacity. |
calc_ptf_pidgeon1972_eawc_fine_sand_organic_matter¶
Estimate extended available water capacity from fine sand and organic matter.
Status: implemented
Prediction target: Extended available water capacity
Models: \(h(\theta)\) — Available-water estimate
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
fine_sand | number | % | — | Fine sand measured by particle-size method 1. |
organic_matter | number | % | — | Organic matter content. |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
extended_available_water_capacity | mm/m | — | Extended available water capacity. |