A plot of grassland between a low dike and the margin of the Naardermeer, a lake near Naarden (prov. N.-Holland), was withdrawn from grazing by cattle and is now used as a hayfield without manuring. A vegetation sketch made in the year 1961 comprises 36 units of vegetation belonging to 9 higher units. The alliance Agropyro-Rumicion crispi is in agreement with the varying circumstances in the habitat. Moles and worms increase the richness in individuals of the said alliance. Soil-analyses afforded interesting ecological facets of some plant species.