International Standards Organisation (ISO)

8157:2022 - Rescaype and SoilWater Improver Products:

3.1.18

soil conditioner

organic/inorganic material added to soils to improve the physical and/or chemical properties, and/or the biological activity of soils with or without a declarable content of nutrients

3.1.20

inorganic soil conditioner

soil conditioner without organic matter, which improves the physical and/or chemical properties, and/or the biological activity of soils.

3.1.21

soil improver

organic/inorganic material that maintains, improves, or protects the physical or chemical properties, the structure or the biological activity of the soil to which it is added with the exception of liming materials

Note 1 to entry: The term “soil amendment” is synonymous with “soil conditioner” under some circumstances.

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3.1.20.1

phosphogypsum (Gypsum)

product produced as a by-product from the wet phosphoric acid process

Note 1 to entry: It is primarily composed of calcium sulfate and containing phosphate some of which is available. It is used as an ameliorant for chemical soil reclamation, calcium-containing fertiliser and raw material for composting.