soil_parameters {BioCro}

Soil properties

Description

A collection of soil property data.

Usage

soil_parameters

Format

A list of named elements, where each element represents the hydraulic properties of one type of soil. The soil types are defined following the USDA soil texture classification scheme, and 11 of the 12 possible types are included ("silt" is not available). The following names are used to indicate the various soil types:

• sand

• loamy_sand

• sandy_loam

• loam

• silt_loam

• sandy_clay_loam

• clay_loam

• silty_clay_loam

• sandy_clay

• silty_clay

• clay

For each soil type, the following parameter values are provided:

• soil_silt_content (dimensionless)

• soil_clay_content (dimensionless)

• soil_sand_content (dimensionless)

• soil_air_entry (J / kg)

• soil_b_coefficient (dimensionless)

• soil_saturated_conductivity (J * s / m^3)

• soil_saturation_capacity (dimensionless)

• soil_field_capacity (dimensionless)

• soil_wilting_point (dimensionless)

• soil_bulk_density (Mg / m^3)

Source

These soil property values are based on Table 9.1 from Campbell and Norman's textbook An Introduction to Environmental Biophysics (1998). Bulk density values are taken from function getsoilprop.c from Melanie (Colorado). The bulk density of sand in getsoilprop.c is 0, which isn't sensible, and here a value of 1.60 Mg / m^3 is used instead.

The wilting point value of 0.21 (corrected from 0.32) for silty clay loam is based on the list of book corrections available from Brian Hornbuckle's teaching website using the Wayback Machine, since it does not seem to be available on his current site.