| abstract |
The invention relates to the field of seed germination and plant cultivation. A composition comprising a clay, an inert material, an optionally fibrous material, and a fourth component is proposed. Said fourth component comprises a cation selected from the group consisting of Al, Zr and Ti, and an anion selected from the group consisting of oxyhydroxide, oxychloride, nitrate, sulfate, chloride, hydroxide and alkoxide. The concentration of the specified fourth component in the composition is in the range from 0.1 to 70 weight percent (wt.%), Preferably 0.5 to 25 wt. %, more preferably 1-10 wt. % of the total mass of clay, inert material and optional fibrous material. |