ptfkit.pidgeon1972
ptfkit.pidgeon1972 ¶
Pidgeon (1972), available-water regressions for ferrallitic soils in Uganda.
Reference
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.
- 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.
| FUNCTION | DESCRIPTION |
|---|---|
calc_ptf_pidgeon1972_awc | Estimate available water capacity from clay and organic matter. |
calc_ptf_pidgeon1972_awc_coarse_sand | Estimate available water capacity from coarse sand. |
calc_ptf_pidgeon1972_awc_fine_sand | Estimate available water capacity from fine sand. |
calc_ptf_pidgeon1972_awc_sand_organic_matter | Estimate available water capacity from sand and organic matter. |
calc_ptf_pidgeon1972_awc_very_fine_sand | Estimate available water capacity from very fine sand. |
calc_ptf_pidgeon1972_eawc | Estimate extended available water capacity from silt, clay, and organic matter. |
calc_ptf_pidgeon1972_eawc_coarse_sand_organic_matter | Estimate extended available water capacity from coarse sand and organic matter. |
calc_ptf_pidgeon1972_eawc_fine_sand_organic_matter | Estimate extended available water capacity from fine sand and organic matter. |
calc_ptf_pidgeon1972_eawc_sand | Estimate extended available water capacity from sand. |
calc_ptf_pidgeon1972_eawc_sand_organic_matter | Estimate extended available water capacity from sand and organic matter. |
calc_ptf_pidgeon1972_fc | Estimate gravimetric field capacity from silt, clay, and organic matter. |
calc_ptf_pidgeon1972_fc_sand | Estimate gravimetric field capacity from sand. |
calc_ptf_pidgeon1972_fc_sand_organic_matter | Estimate gravimetric field capacity from sand and organic matter. |
calc_ptf_pidgeon1972_fc_vol_sand_organic_matter | Estimate volumetric field capacity from sand and organic matter. |
calc_ptf_pidgeon1972_pwp | Estimate permanent wilting point from silt, clay, and organic matter. |
calc_ptf_pidgeon1972_pwp_sand | Estimate permanent wilting point from sand. |
calc_ptf_pidgeon1972_pwp_sand_organic_matter | Estimate permanent wilting point from sand and organic matter. |
calc_ptf_pidgeon1972_awc ¶
calc_ptf_pidgeon1972_awc(*, clay: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_awc(*, clay: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate available water capacity from clay and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
clay | Clay measured by particle-size method 1. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
available_water_capacity | Available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_awc_coarse_sand ¶
calc_ptf_pidgeon1972_awc_coarse_sand(*, coarse_sand: float) -> floating
calc_ptf_pidgeon1972_awc_coarse_sand(*, coarse_sand: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate available water capacity from coarse sand.
| PARAMETER | DESCRIPTION |
|---|---|
coarse_sand | Coarse sand measured by particle-size method 1. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
available_water_capacity | Available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_awc_fine_sand ¶
calc_ptf_pidgeon1972_awc_fine_sand(*, fine_sand: float) -> floating
calc_ptf_pidgeon1972_awc_fine_sand(*, fine_sand: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate available water capacity from fine sand.
| PARAMETER | DESCRIPTION |
|---|---|
fine_sand | Fine sand measured by particle-size method 1. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
available_water_capacity | Available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_awc_sand_organic_matter ¶
calc_ptf_pidgeon1972_awc_sand_organic_matter(*, sand: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_awc_sand_organic_matter(*, sand: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate available water capacity from sand and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
sand | Sand measured by particle-size method 2. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
available_water_capacity | Available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_awc_very_fine_sand ¶
calc_ptf_pidgeon1972_awc_very_fine_sand(*, very_fine_sand: float) -> floating
calc_ptf_pidgeon1972_awc_very_fine_sand(*, very_fine_sand: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate available water capacity from very fine sand.
| PARAMETER | DESCRIPTION |
|---|---|
very_fine_sand | Very fine sand measured by particle-size method 1. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
available_water_capacity | Available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_eawc ¶
calc_ptf_pidgeon1972_eawc(*, silt: float, clay: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_eawc(*, silt: ArrayLike, clay: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate extended available water capacity from silt, clay, and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
silt | Silt measured by particle-size method 2. (%) TYPE: |
clay | Clay measured by particle-size method 2. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
extended_available_water_capacity | Extended available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Extended available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_eawc_coarse_sand_organic_matter ¶
calc_ptf_pidgeon1972_eawc_coarse_sand_organic_matter(*, coarse_sand: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_eawc_coarse_sand_organic_matter(*, coarse_sand: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate extended available water capacity from coarse sand and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
coarse_sand | Coarse sand measured by particle-size method 1. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
extended_available_water_capacity | Extended available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Extended available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_eawc_fine_sand_organic_matter ¶
calc_ptf_pidgeon1972_eawc_fine_sand_organic_matter(*, fine_sand: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_eawc_fine_sand_organic_matter(*, fine_sand: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate extended available water capacity from fine sand and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
fine_sand | Fine sand measured by particle-size method 1. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
extended_available_water_capacity | Extended available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Extended available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_eawc_sand ¶
calc_ptf_pidgeon1972_eawc_sand(*, sand: float) -> floating
calc_ptf_pidgeon1972_eawc_sand(*, sand: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate extended available water capacity from sand.
| PARAMETER | DESCRIPTION |
|---|---|
sand | Sand measured by particle-size method 2. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
extended_available_water_capacity | Extended available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Extended available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_eawc_sand_organic_matter ¶
calc_ptf_pidgeon1972_eawc_sand_organic_matter(*, sand: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_eawc_sand_organic_matter(*, sand: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate extended available water capacity from sand and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
sand | Sand measured by particle-size method 1. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
extended_available_water_capacity | Extended available water capacity. (mm/m) TYPE: |
Models
\(h(\theta)\): Available-water estimate
Notes
Prediction target: Extended available water capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_fc ¶
calc_ptf_pidgeon1972_fc(*, silt: float, clay: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_fc(*, silt: ArrayLike, clay: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate gravimetric field capacity from silt, clay, and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
silt | Silt measured by particle-size method 2. (%) TYPE: |
clay | Clay measured by particle-size method 2. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
field_capacity | Gravimetric field capacity. (% w/w) TYPE: |
Models
\(h(\theta)\): Point estimate
Notes
Prediction target: Gravimetric field capacity The reviewed organic-matter coefficient is 1.54.
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_fc_sand ¶
calc_ptf_pidgeon1972_fc_sand(*, sand: float) -> floating
calc_ptf_pidgeon1972_fc_sand(*, sand: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate gravimetric field capacity from sand.
| PARAMETER | DESCRIPTION |
|---|---|
sand | Sand measured by particle-size method 2. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
field_capacity | Gravimetric field capacity. (% w/w) TYPE: |
Models
\(h(\theta)\): Point estimate
Notes
Prediction target: Gravimetric field capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_fc_sand_organic_matter ¶
calc_ptf_pidgeon1972_fc_sand_organic_matter(*, sand: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_fc_sand_organic_matter(*, sand: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate gravimetric field capacity from sand and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
sand | Sand measured by particle-size method 2. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
field_capacity | Gravimetric field capacity. (% w/w) TYPE: |
Models
\(h(\theta)\): Point estimate
Notes
Prediction target: Gravimetric field capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_fc_vol_sand_organic_matter ¶
calc_ptf_pidgeon1972_fc_vol_sand_organic_matter(*, sand: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_fc_vol_sand_organic_matter(*, sand: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate volumetric field capacity from sand and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
sand | Sand measured by particle-size method 2. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
field_capacity | Volumetric field capacity. (% v/v) TYPE: |
Models
\(h(\theta)\): Point estimate
Notes
Prediction target: Volumetric field capacity
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_pwp ¶
calc_ptf_pidgeon1972_pwp(*, silt: float, clay: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_pwp(*, silt: ArrayLike, clay: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate permanent wilting point from silt, clay, and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
silt | Silt measured by particle-size method 2. (%) TYPE: |
clay | Clay measured by particle-size method 2. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
permanent_wilting_point | Permanent wilting point. (% w/w) TYPE: |
Models
\(h(\theta)\): Point estimate
Notes
Prediction target: Gravimetric permanent wilting point
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_pwp_sand ¶
calc_ptf_pidgeon1972_pwp_sand(*, sand: float) -> floating
calc_ptf_pidgeon1972_pwp_sand(*, sand: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate permanent wilting point from sand.
| PARAMETER | DESCRIPTION |
|---|---|
sand | Sand measured by particle-size method 1. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
permanent_wilting_point | Permanent wilting point. (% w/w) TYPE: |
Models
\(h(\theta)\): Point estimate
Notes
Prediction target: Gravimetric permanent wilting point
Source code in ptfkit/pidgeon1972.py
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calc_ptf_pidgeon1972_pwp_sand_organic_matter ¶
calc_ptf_pidgeon1972_pwp_sand_organic_matter(*, sand: float, organic_matter: float) -> floating
calc_ptf_pidgeon1972_pwp_sand_organic_matter(*, sand: ArrayLike, organic_matter: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]
Estimate permanent wilting point from sand and organic matter.
| PARAMETER | DESCRIPTION |
|---|---|
sand | Sand measured by particle-size method 2. (%) TYPE: |
organic_matter | Organic matter content. (%) TYPE: |
out | Optional output arrays for in-place calculation. TYPE: |
| RETURNS | DESCRIPTION |
|---|---|
permanent_wilting_point | Permanent wilting point. (% w/w) TYPE: |
Models
\(h(\theta)\): Point estimate
Notes
Prediction target: Gravimetric permanent wilting point
Source code in ptfkit/pidgeon1972.py
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