pF_curve

This function compute water content at given pressure head, using Van Genuchten water retention curve

The Open Bodem Index (OBI) is a method to evaluate the quality of soils of agricultural fields in The Netherlands and the sustainability of the current agricultural practices.
The OBI score is based on four main criteria: chemical, physical, biological and management, which consist of more than 21 indicators.
By providing results of a soil analysis and management info the 'OBIC' package can be use to calculate he scores, indicators and derivatives that are used by the OBI.
More information about the Open Bodem Index can be found at <https://openbodemindex.nl/>.

Sven Verweij

OBIC

Calculate the Open Bodem Index (OBI) Score

Gerard Ros

Yuki Fujita

Kees van den Dool

Job de Pater

Nutriënten Managment Instituut 

pF_curve function

<dl><dt>head</dt>
<dd>(numeric) suction pressure ([L] or cm of water)</dd>
<dt>thetaR</dt>
<dd>(numeric) residual water content (cm3/cm3)</dd>
<dt>thetaS</dt>
<dd>(numeric) saturated water content (cm3/cm3)</dd>
<dt>alfa</dt>
<dd>(numeric) related to the inverse of the air entry suction, alfa &gt; 0 (1/cm)</dd>
<dt>n</dt>
<dd>(numeric) a measure of the pore-size distribution, n&gt;1, dimensionless</dd></dl>

Arguments

Water retention curve — pF_curve

<dl>

<dt>head</dt>
<dd>(numeric) suction pressure ([L] or cm of water)</dd>


<dt>thetaR</dt>
<dd>(numeric) residual water content (cm3/cm3)</dd>


<dt>thetaS</dt>
<dd>(numeric) saturated water content (cm3/cm3)</dd>


<dt>alfa</dt>
<dd>(numeric) related to the inverse of the air entry suction, alfa &gt; 0 (1/cm)</dd>


<dt>n</dt>
<dd>(numeric) a measure of the pore-size distribution, n&gt;1, dimensionless</dd>

</dl>

pF_curve: Water retention curve

Description

Usage

Value

Arguments

Examples