By 1929 the polder was dry. Rain normally washes salt from reclaimed land in six or seven years; to make the soil useful faster, gypsum was added to the soil with different fertilizers in various parts of the experimental farm. The land became an ordinary farm on 1 November 1935 after tests showed that the polder could be cultivated. With the experience gained in the pilot, development of the polder Wieringermeer was accelerated.
