Chemicals used in agriculture, horticulture and forestry; fermentation products used in agriculture, horticulture and forestry; fermentation products, cultures and preparations of micro-organisms other than for medical and veterinary use; fermentation products, cultures and preparations of micro-organisms used in manures, fertilisers, soil conditioners, fertiliser additives and liquids in this class; fermentation products, cultures and preparations of micro-organisms for preserving animal foodstuffs; fermentation products, cultures and preparations of micro-organisms for conditioning animal foodstuffs; plant growth regulating preparations; soil regulating preparations, but excluding all food preservatives for human consumption, industrial starches and chemicals used exclusively in science and photography