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US 5,024,689 AGranted
Nitrogen fertilizer
AssigneeFreeport-McMoRan Resource Partners
InventorsAllen R. Sutton, Richard L. Balser
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AssigneeFreeport-McMoRan Resource Partners
InventorsAllen R. Sutton, Richard L. Balser
Estimating the term…
An improved aqueous nitrogen fertilizer has been developed that increases first-year nitrogen uptake efficiency to plants. It is also a nitrogen with features to minimize exposure to nitrogen loss. It is a nitrogen fertilizer consisting of urea, ammonium nitrate, dicyandiamide, ammonium thiosulfate, and a phosphate compound which is preferably an ammonium phosphate compound. This composition can contain a herbicide and/or various micro nutrients. This aqueous fertilizer solution can be applied to a field crop in a single application and is available to the growing plant throughout its growth and maturing cycle. The aqueous fertilizer composition is conveniently prepared by the addition of a slurry containing dicyandiamide, ammonium thiosulfate and the phosphate compound to a urea-ammonium nitrate solution wherein the nitrogen content has been adjusted to account for the nitrogen that will be supplied by the slurry.
A method of enhancing the growth of plants by applying to the area where the plants are to be grown an aqueous fertilizer solution comprising ammonium nitrate, urea, dicyandiamide, ammonium thiosulfate and an ammonium phosphate compound, wherein the dicyandiamide is included in the amount of about 1% to about 2% by weight based on the total weight of the solution.
A method of making an aqueous fertilizer solution containing ammonium nitrate, urea, dicyandiamide, ammonium thiosulfate and an ammonium phosphate compound comprising forming an aqueous slurry of the dicyandiamide, ammonium thiosulfate and ammonium phosphate compound and adding this slurry to an aqueous solution of ammonium nitrate and urea, wherein the slurry includes dicyandiamide in an amount to produce a fertilizer solution containing about 1.0% to about 2.0% by weight dicyandiamide based on the total weight of the solution.
A method of inhibiting nitrification in soil of an aqueous fertilizer solution containing ammonium nitrate, urea and ammonium phosphate wherein said method comprises adding about 1.0% to 2.0% dicyandiamide and about 1.0% to 3.0% ammonium thiosulfate to said aqueous fertilizer solution containing ammonium nitrate, urea and ammonium phosphate, wherein the percentages are by weight based on the total weight of the aqueous fertilizer solution.
A method of enhancing the growth of plants by applying to the area where the plants are to be grown an aqueous fertilizer solution comprising about 34 to 42 percent by weight of ammonium nitrate;
Dependencies are inferred from the claim text.