Cover for weeds

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Cover for weeds on grassland or on arable land, fodder meadows sorrel on, for example, of, for an extraction of light for the biological control of weeds, characterized in that the cover, of the web (3) optionally in flat spherical segment form of a mixture of clay or loess and Lime and or or earth upon mixing with hay and the like biological Fiber material from agriculture as adhesive or of a plurality of such mixtures one above the other is formed.