There are three natural divisions - foreshore and sand-dunes, inner dunes and the geest grounds, and low fens and clay lands.
In the depressions of the dunes and on' the geest grounds at their foot, small woods have been planted in places, and in this sheltered strip market-gardening and horticulture are practised.
Horticulture and market-gardening are of a high order, and flourish especially on the low fen soil and geest grounds along the foot of the dunes in the provinces of North and South Holland.
Horticulture flourishes, especially along the margin of the geest grounds from about 5 m.
The natural division into dunes, geest grounds, and clay and low fen holds for South as well as for North Holland.