Energy forest is a term used for the cultivation of fast-growing trees, mostly poplars, willows, and robinias, on
cropland or pastureland. The harvest (also referred to as “stock”) takes place, not like with “conventional” forest, only once in 30-100 years, but within 2-10 years, depending on the system and planning. An energy forest sprouts after harvesting (ground-level pruning) again and can be used in this manner about 5 times. At the end of its useful life (15-25 years), the energy forest is removed using a forestry cutter and can subsequently be used for other arable crops, lawns or a new energy forest.
The harvest of an energy forest (about 7-15 tons of dry matter) is about two-for times as much as that of a normal forest; and, contrary to the expectations of many people, it does not leach out the soil, but promotes humus formation in many ways and has a regulating effect on the water balance in it. In large-scale planting, you should ensure a balanced mixture of varieties to avoid the known agricultural problems of monocultures whenever possible.