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Term for unrotted organic materials, derived from the Low German "mul" for "decaying earth or dust" or from "mulsch" for "rotten, soft". In horticulture and viticulture, it refers to a covering of soil. Mulching is a typical measure of biological or integrated plant protection. Before winter, the vineyard soil is usually covered with organic materials of plant origin. For example, straw, bark (left), leaves (right), peat, chopped green waste, living plants and waste from pruning are used. This prevents the soil from drying out through evaporation (evaporation) of water from the soil, ensures good irrigation and suppresses weed growth.

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