Fertiliser compositions
OwnerBertram Francis Charles Quininventor
Life of this patent
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Abstract
A fertiliser composition in the form of granules or prills where urea has been coated with wet ground sulphur. The wet ground sulphur is preferably applied serially and/or simultaneously with one or both of a nitrification inhibitor and a urease inhibitor. In its preferred form there is a core of urea and an inner peripheral zone of both at least urea and sulphur. The outer peripheral zone can be of at least urea and sulphur or at least sulphur, or both.
Claims44
A particulate fertiliser composition of particulate urea coated with wet ground sulphur.
A particulate fertiliser composition of particulate urea coated with both sulphur and a nitrification inhibitor.
A particulate fertiliser composition of particulate urea coated with both sulphur and a urease inhibitor.
A urea based fertiliser being or having urea granules coated to provide a surrounding matrix of both sulphur and a nitrification inhibitor, the sulphur binding into the urea to create a mixed urea/sulphur transition zone which may include some of said nitrification inhibitor.
A urea based fertiliser being or having urea granules coated to provide a surrounding matrix of both sulphur and a urease inhibitor, the sulphur binding into the urea to create a mixed urea/sulphur transition zone which may include some of said urease inhibitor.
A urea based fertiliser being or having urea granules coated to provide a surrounding matrix of sulphur, a urease inhibitor and a nitrification inhibitor, the sulphur binding into the urea to create a mixed urea/sulphur transition zone which may include some of one or both of said nitrification and urease inhibitors.
A fertiliser in granule, prill or the like form having a core of urea, an inner peripheral zone of both at least urea and sulphur and an outer peripheral zone of both at least urea and sulphur and an outer peripheral zone of at least sulphur.
A method of preparing a fertiliser from particulate urea which comprises or includes mixing such particulate urea (serially and/or simultaneously) with a wetground elementary sulphur and a compatible nitrification inhibitor.
A method of preparing a fertiliser from particulate urea which comprises or includes mixing such particulate urea (serially and/or simultaneously) with a wetground elementary sulphur and a compatible nitrification and urease inhibitor.
A method of preparing a fertiliser from particulate urea which comprises or includes mixing such particulate urea (serially and/or simultaneously) with a wetground elementary sulphur and a compatible nitrification and urease inhibitor.
A urea granule or prill based fertiliser having a surround which includes both elementary sulphur and a nitrification inhibitor, the sulphur binding or assisting in the binding of the nitrification inhibitor to the urea.
A urea granule or prill based fertiliser having a surround which includes both elementary sulphur and a urease inhibitor, the sulphur binding or assisting in the binding of the urease inhibitor to the urea.
A urea granule or prill based fertiliser having a surround which includes both elementary sulphur and a urease inhibitor, the sulphur binding or assisting in the binding of the urease inhibitor to the urea.
Dependencies are inferred from the claim text.