Table of Contents

• Initialisation

Initialisation

Initialize soil profile from site input. At this point all invalid strata properties have been already gap-filled by default values.

Bulk soil characterization may in- or exclude rocks/stones/gravel depending on different measurement approaches and points of view. While smaller gravel is most likely included in soil samples of, e.g., bulk density, greater stones or rocks are commonly excluded. Within the context of LandscapeDNDC, all soil input refers to the bulk soil excluding rocks/stones/gravel. The volume fraction of rocks/stones/gravel is separately considered and used to to calculate the correct internal process variables such as pore space or water per square meter of soil.

• Texture (clay and sand)
• Stone fraction
• pH value
• Saturated hydraulic conductivity
• Bulk density Internally used bulk density \( \rho \) includes bulk density of the soil without stones \( \rho^{\ast} \) and bulk density of stones \( \rho_{min} \):
  
  \( \rho = \rho^{\ast} (1 - x_{stone}) + \rho_{min} x_{stone} \)
  
  
• Iron
• Carbon and nitrogen content Internally used organic carbon and nitrogen contents include stones:
  
  \( c_{org} = c_{org}^{\ast} (1 - x_{stone}) \frac{\rho}{\rho^{\ast}} \)
  
  
• Porosity
• Van Genuchten parameters
• Maximum and minimum water filled pore space
• Field capacity and wilting point