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eutrophication

See below fertilization,

Term for the practice in agriculture, by supplying nutrients mineral and organic nature ground compensate. The name is derived from "manure" (droppings from herbivores, especially hoofed animals). This oldest form of fertilizer was used at least six millennia ago. A targeted fertilization started in the 18th century with wood ash, lime and marl. Around 1840, the German chemist Justus Liebig (1803-1873) demonstrated the growth-promoting effects of potassium, phosphorus and nitrogen. He wrote in his main work "Organic Chemistry in its Application to Agriculture and physiology “: The soil must be fully restored to what is taken from it by harvesting.

Of course, these principles also apply to viticulture. During the annual growth cycle large amounts of nutrients are extracted from the soil in the vineyard. Losses result from washing out (on light soils, especially of boron, potassium and magnesium) erosion (Soil erosion, especially on slopes), gaseous loss (especially nitrogen) and determination (binding of nutrients in a form not available to plants), as well as through the grape harvest. A vine with around 200 leaves produces annually growth cycle around half a kilo of dry matter, that is shoots. leaves and grapes, There are statutory fertilizer regulations for agricultural land within the EU.

The Rebstock In contrast to other plants, soil fertility is less demanding. It is a phenomenon that there are many famous locations with top wines, which often have a relatively poor soil. A certain nutrient stress can even have a very positive effect. However, this does not mean that the quality of the wine automatically increases as the soil becomes barren. Too little (lack) is just as negative as too much (over-fertilization). The necessary fertilization measures usually have to be checked every five to six years by soil tests. This usually includes determining inventories boron. potassium. calcium (Lime),...

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