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Abstract

Disclosed is a spherical fertiliser granulate, which contains magnesium, sulphate and urea, each with respect to the total weight of the granulate, in the following quantities: Urea, calculated as elemental nitrogen, in a quantity of 20.0 to 38.0 wt %, magnesium, calculated as elemental magnesium, in a quantity of 1.5 to 9.5 wt % and sulphate, calculated as elemental sulphur, in a quantity of 2.7 to 12.0 wt %, wherein at least a portion of the magnesium, the urea and the sulphate is present in the form of at least one of the crystalline phases of the formulae MgSO₄*6 NH₂—C(═O)—NH₂*0.5 H₂O (I) and MgSO₄*4 NH₂—C(═O)—NH₂*H₂O (II), wherein 1 to 20 wt %, in particular 3 to 18 wt % and especially 5 to 15 wt % of the magnesium contained in the fertilizer granulate, calculated in each case as elemental magnesium, is present in the form of water-insoluble magnesium salts. Disclosed also is a process for manufacturing the fertiliser granulate as well as the use of the fertiliser granulate as fertiliser or in fertiliser mixtures.

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