Beschreibung:
<p>Preliminary studies conducted in Finland show that: -- our forests and peatlands represent a great potential source of food for human consumption (berries and mushrooms) -- only a minute proportion of the total yield is harvested for export and the home market -- forest improvement methods commonly used on peatlands do not increase berry yields as much as tree growth and mushroom production. Especially Vaccinium oxycoccos seems to suffer from low groundwater levels caused by ditching -- fertilization increases mushroom production as well as yields of Vaccinium myrtillus and V. vitisidaea -- ploughing of mineral soils increases the yield of Gyromitra esculenta -- clear-cutting has a detrimental effect on many forest byproducts favoured by moist or sheltered conditions -- more research work must be carried out on forest ecosystems to ascertain which improvement and silvicultural methods continually give the highest level of total production (timber and by-products).</p>