Type 1 represents the primary root. Type 2 the secondary root. Type 4 is automatically calculated by CRootBox as define basal roots, in our case we did not define this root type. Then, CRootBox uses the primary root parameters (type 1) to define type 4.

Roots with mycorrhizae architecture

If we use the parameter included the mycorrhizae and their ramifications, we get the following architecture after 30 days simulation.