SPNA
The Stichting Proefboerderijen Noordelijke Akkerbouw, or SPNA for short, is the research institute for arable farming on the Northern clay. SPNA has two experimental farms. At the test farm ‘Kollumerwaard’ in Munnekezijl is focused on practical research in the field of (seed) potatoes and sugar beets. Both conventional and organic cultivation takes place. The second…