A DC electromagnet is simply a coil of wire connected to a DC voltage source. It can have an air core or an iron core.
Northern Highbush Varieties. High Chill Varieties. Northern Highbush varieties are the most widely planted blueberries in the world. They grow best in temperate climates where total winter chilling is 1,000 hours or more.Except where listed, most Northern Highbush varieties are relatively self-fertile.orthland is the one of the most cold-hardy Highbush varieties. It is vigorous, easy to grow and adaptable to different soil types and conditions. Northland yields are heavy and the berries are sweet with high sugar content.
Edible Purple Berries on an Ornamental Shrub. The Viking Chokeberry, Aronia melanocarpa 'Viking Black', is a multi-stemmed, ornamental shrub with attractive flowers and edible berries in the fall. Plant several in a naturalized area or just one as a focal point in your yard. Some people even use these as an orchard plant for their delicious fall fruit. Your Viking Chokeberry is one of the best aronia cultivars available.