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Food production requires agricultural land. The area needed to feed a population depends on the one hand on production systems (e.g. yields per hectare), and on the other hand on the consumption (pattern) of this population. The amount of land available for food production is declining due to various reasons. Several studies on the food security item(More)
In the vicinity of a large ammonia emission area, dry and wet deposition of acidifying and eutrophying compounds onto Douglas Fir forests was studied by sampling throughfall, stemflow and bulk precipitation. Deposition amounts of NH(4)(+) and SO(4)(2-) were recognised to be among the highest of Central Europe, resulting in extremely high inputs of(More)
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