Around 1900, major changes took place in agriculture. Groundbreaking achievements include the introduction of artificial fertilisers and animal feed, the mechanisation of agriculture and exports abroad. They made it possible to farm on a large scale. Fields and moorland become pastureland, the coppice forest on the Glanerbeek becomes agricultural land and new fields are created. After 1935, there were no more major changes in the Aamsveen.
After the war, the Dutch state acquires the wasteland. As a measure against the expected unemployment, the unemployed are offered employment in cultivation programmes. However, the employment situation developed more favourably than expected. After 1950, the number of people who wanted to preserve Aamsveen in its former state grew. In 1967, Overijssels Landschap (the predecessor organisation of the Landschap Overijssel Foundation) takes over Aamsveen on a 50-year leasehold.