The invention relates to a coated granular fertilizer, preferably wherein granules are sulfate-based or phosphate-based. When sulfate based granules, as in ammonium sulfate, the coating substance is an inorganic salt of alkaline earth elements, preferably calcium, such that when applied to the surface of fertilizers, forms calcium sulfate, preferably a calcium sulfate-dihydrate, as a protective coating. For a reactive coating of a thiosulfate, free sulfuric acid present on the granule reacts to provide an elemental sulfur coating. For ammonium phosphate-based granules, coatings may comprise compounds of Ca.sup.++, Al.sup.+++ and/or Fe.sup.+++ salts thereby forming a calcium, an aluminum, an iron, or mixed cation phosphate protective coating. Thiosulfate is also effective with phosphate based granules which are manufactured with sulfuric acid. Granules coated according to the disclosure have advantageous properties as the coating can be applied in a specified and sparing manner due to its tendency to adhere to surfaces during the reaction. Coated fertilizer granules of the disclosure are also advantageous in that, with regard to the applied amount of coating, they provide increased resistance to dusting in long term warehouse storage, to moisture uptake and to oxidative heating. Coating components also add nutrients to plants that can provide nutrients over a longer period of time such as a slow-release characteristic.

A method may be employed to produce a fertilizer granulate comprising an ammonium salt and, as a filler material, limestone, dolomite, and/or magnesite. At least a proportion of the limestone or dolomite or magnesite is at least partially calcinated prior to use in the fertilizer granulate. A targeted adjustment of the reactivity of the filler material may occur by its degree of calcination and/or its calcite proportion. If, for example, dolomite is used as a filler material, the calcination results in separation of carbon dioxide from the mineral. This calcination is a two-stage process in which the dolomite is first converted to periclase (MgO) and calcite (CaCO3), and the calcite is also converted by decomposition and release of carbon dioxide only at a higher temperature.

A method may be employed to produce a fertilizer granulate comprising an ammonium salt and, as a filler material, limestone, dolomite, and/or magnesite. At least a proportion of the limestone or dolomite or magnesite is at least partially calcinated prior to use in the fertilizer granulate. A targeted adjustment of the reactivity of the filler material may occur by its degree of calcination and/or its calcite proportion. If, for example, dolomite is used as a filler material, the calcination results in separation of carbon dioxide from the mineral. This calcination is a two-stage process in which the dolomite is first converted to periclase (MgO) and calcite (CaCO3), and the calcite is also converted by decomposition and release of carbon dioxide only at a higher temperature.

A method may be employed to produce a fertilizer granulate comprising an ammonium salt and, as a filler material, limestone, dolomite, and/or magnesite. At least a proportion of the limestone or dolomite or magnesite is at least partially calcinated prior to use in the fertilizer granulate. A targeted adjustment of the reactivity of the filler material may occur by its degree of calcination and/or its calcite proportion. If, for example, dolomite is used as a filler material, the calcination results in separation of carbon dioxide from the mineral. This calcination is a two-stage process in which the dolomite is first converted to periclase (MgO) and calcite (CaCO3), and the calcite is also converted by decomposition and release of carbon dioxide only at a higher temperature.

The invention relates to a fertilizer mixture comprising A. calcium ammonium nitrate mineral fertilizer which, besides ammonium nitrate and calcium carbonate and/or magnesium carbonate and optionally water, may contain up to 15 wt %, based on the calcium ammonium nitrate mineral fertilizer without water, of further ingredients, B. 100 to 10 000 ppm by weight, based on component A without water, of 2-(N-3,4-dimethylpyrazole)succinic acid.

The invention relates to a fertilizer mixture comprising A. calcium ammonium nitrate mineral fertilizer which, besides ammonium nitrate and calcium carbonate and/or magnesium carbonate and optionally water, may contain up to 15 wt %, based on the calcium ammonium nitrate mineral fertilizer without water, of further ingredients, B. 100 to 10 000 ppm by weight, based on component A without water, of 2-(N-3,4-dimethylpyrazole)succinic acid.

Described herein are agricultural compositions comprising an adduct of urea comprising: urea; and an inorganic salt; wherein the adduct has an average particle size ranging from about 0.1 microns to about 10 microns.

Described herein are agricultural compositions comprising an adduct of urea comprising: urea; and an inorganic salt; wherein the adduct has an average particle size ranging from about 0.1 microns to about 10 microns.

A fertiliser comprising both sulphur and a solution of urea and ammonium nitrate in water is disclosed. Processes for making such a fertiliser are also disclosed.

A fertiliser comprising both sulphur and a solution of urea and ammonium nitrate in water is disclosed. Processes for making such a fertiliser are also disclosed.