Soils of Brittany — Combourg: Map of soils at 1/10000

Soil map of Combourg at 1/10000 was made in 1981 by the Chamber of Agriculture of Ille-et-Vilaine.

The coding corresponds to code 4 soil criteria of the Armoricain Massif (see online resources).
The fields of the successful table are:
— SUB: Parent material(s) from which the soil develops
— HYD: Hydromorphic class, 0 (well drained soil) to 9 (extremely hydromorphic soil)
— TYPE: Profile development defined from the succession of horizons
— TEACHER: Soil depth, classified from 1 (very thick soils) to 6 (surface soils)
— CODE4C: code 4 criteria derived from the concatenation of the previous fields.
The values taken by the different fields for each entity are detailed in the 4 criteria method (see online resources).

— UTS: Soil Typological Unit number from the Regional Pedological Reference Office of Brittany.