The image shows grafts used for tree breeding in Haapastensyrja

Pinus sylvestris in Nisula Roll located at Haapastensyrja

Niels Kreiberg standing next to 5 yr Populus tremula × Populus tremuloides in Haapastensyrja

Rooted cuttings of PIa in heated peat at Haapastensyrja

The plastic house is not used in winter. It shows end venting. Located at Haapastensyrja

200 ppm