PCT No. PCT/NL95/00315 Sec. 371 Date Mar. 13, 1997 Sec. 102(e) Date Mar. 13, 1997 PCT Filed Sep. 22, 1995 PCT Pub. No. WO96/09355 PCT Pub. Date Mar. 28, 1996A covering material for agricultural soil contains starch or a derivative or fraction thereof as binder together with a structure-improving amount of an acid and/or an oil, and a finely divided vegetable filler such as straw. The oil is for instance palm oil or linseed oil in an amount of 1-25 wt. %. The acid is preferably 0.2-4% by weight of phosphoric acid or citric acid. The material may further comprise fungicides, bentonite and/or rubber latices.
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