Abstract: The present invention relates to the use of a solvent selected from the group consisting of glycol ether, glycerin ether, and mixtures thereof for stabilizing at least one (thio)phosphoric acid triamide in a fertilizer composition (1) comprising a urea-containing fertilizer (F1) and a urease inhibitor formulation (Ul) comprising a mixture (A) comprising the at least one (thio)phosphoric acid triamide and the solvent (C), wherein the inhibitor formulation (Ul) is polymer free. Further, the present invention relates to a urease inhibitor formulation (Ul) and to a fertilizer composition (1) each comprising at least one (thio)phosphoric acid triamide and specific solvents.

Abstract: The present invention relates to mixtures comprising a carrier A comprising a compound I (first nitrification inhibitor) and a carrier B optionally comprising a compound II (second nitrification inhibitor), wherein the compound I (first nitrification inhibitor) and the compound II (second nitrification inhibitor) are both selected from the group consisting of different nitrification inhibitors; to a method for improving the nitrification-inhibiting effect, or for increasing the health of a plant using mixtures of one compound I and one compound II; to the use of mixtures comprising compounds I and compounds II for increasing the health of a plant; to agrochemical compositions comprising these mixtures; and to plant propagation material, comprising these mixtures or these agrochemical compositions. The present invention especially relates to mixtures comprising DMPSA and DMP/DMPP.

Abstract: The present invention relates to mixtures comprising a solid carrier comprising an urease inhibitor and a further solid carrier comprising a nitrification inhibitor such as 3,4-dimethyl pyrazole phosphate (DMPP) or 2-(3,4-dimethyl-1H-pyrazol-1-yl) succinic acid (DMPSA), to a method for improving the nitrification-inhibiting effect, or for increasing the health of a plant using mixtures of at least one compound I and at least one compound II; to the use of mixtures comprising compounds I and compounds II for increasing the health of a plant.

Abstract: The present invention relates to a method of improving the growth and/or the yield of plants grown on agriculturally or horticulturally utilized substrates by applying at least one active compound (nitrification inhibitor) on agriculturally or horticulturally utilized substrates, wherein the at least one active compound I is added to the irrigation system in a water-dissolved form.