Anchoring and type de soil
Sandy soil, rocky soil ... what anchorage?
Soils can be classified according to the following classification (from the most loose soil to the most compact soil):
Classe A - Anchoring on light and soft ground (loose sands, soft clay ...)
Classe B - Anchoring on slightly stony and moderately consistent soils (silt, marl, clay loess ...)
Classe C - Anchoring on moderately stony and dense soils (gravel / coarse-grained sand mix ...)
Classe D - Anchoring on very stony and compact soils (heavy clay mixed with pebbles or stones)