With all the new hazelnut acreage coming in in places where hazelnuts have never grown before, it is not uncommon to see some nutrient deficiencies in some of these young hazelnut trees. If you are seeing some interveinal chlorosis in some of the older leaves, you may be experiencing a magnesium deficiency. Check out this brief video interview with Aaron Heinrich from Oregon State University who shares how to identify and correct this deficiency in the orchard. Read more about growing hazelnuts in Pacific Nut Producer Magazine.