Common response function for soil moisture

The common response function for soil moisture is, as opposed to the common response function for temperature, a standard response function in it self. Therefore there is no need for a switch connected to this function. This function is automatically called for in processes such as nitrification, decomposition and respiration.

The common soil moisture response function, f(θ), looks different depending soil moisture content:

1.  θ = θ_s

 

 

2.  θ_wilt < θ  < θ_s

 

 

3.  θ  < θ_wilt
                                                   (5.86)

 

 

where p_θUpp, p_θLow, p_θSatact, and p_θp are parameters and the variables, θ_s, θ_wilt and θ, are the soil moisture content at saturation, the soil moisture content at the wilting point and the actual soil moisture content respectively, described in the section “Soil Water Processes”. See viewing function Common Soil Moisture Response Function.