A solid phase fertilizer composition comprises precipitated complexes consisting of basic L-amino acid, polyphosphate, and Ca (II) metal ion, wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complexes consists of Ca (II). A method of preparing a solid phase fertilizer composition comprises providing a liquid comprising at least one basic L-amino acid; adding a polyphosphate source; adding a source of Ca (II) metal ion; increasing the pH to precipitate a complex consisting of basic L-amino acid, polyphosphate, and Ca (II) metal ion, wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complex consists of Ca (II); and collecting and drying the precipitated complex to provide a solid phase fertilizer.

A solid phase fertilizer composition comprises precipitated complexes consisting of basic L-amino acid, polyphosphate, and Ca (II) metal ion, wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complexes consists of Ca (II). A method of preparing a solid phase fertilizer composition comprises providing a liquid comprising at least one basic L-amino acid; adding a polyphosphate source; adding a source of Ca (II) metal ion; increasing the pH to precipitate a complex consisting of basic L-amino acid, polyphosphate, and Ca (II) metal ion, wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complex consists of Ca (II); and collecting and drying the precipitated complex to provide a solid phase fertilizer.

A solid phase fertilizer composition comprises precipitated complexes consisting of basic L-amino acid, polyphosphate, and Ca (II) metal ion, wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complexes consists of Ca (II). A method of preparing a solid phase fertilizer composition comprises providing a liquid comprising at least one basic L-amino acid; adding a polyphosphate source; adding a source of Ca (II) metal ion; increasing the pH to precipitate a complex consisting of basic L-amino acid, polyphosphate, and Ca (II) metal ion, wherein the number of phosphorous atoms in the polyphosphate is at least or equal to six and wherein metal in the complex consists of Ca (II); and collecting and drying the precipitated complex to provide a solid phase fertilizer.

A composite particle and a population of particles comprising a water-insoluble polyphosphate composition, methods of producing, and methods of using the same are provided. The polyphosphate composition may comprise at least one alkaline earth metal selected from calcium and magnesium and optionally at least one nutrient ion selected from the group consisting of potassium, ammonium, zinc, iron, manganese, copper, boron, chlorine, iodine, molybdenum, selenium or sulfur.

A composite particle and a population of particles comprising a water-insoluble polyphosphate composition, methods of producing, and methods of using the same are provided. The polyphosphate composition may comprise at least one alkaline earth metal selected from calcium and magnesium and optionally at least one nutrient ion selected from the group consisting of potassium, ammonium, zinc, iron, manganese, copper, boron, chlorine, iodine, molybdenum, selenium or sulfur.

A composite particle and a population of particles comprising a water-insoluble polyphosphate composition, methods of producing, and methods of using the same are provided. The polyphosphate composition may comprise at least one alkaline earth metal selected from calcium and magnesium and optionally at least one nutrient ion selected from the group consisting of potassium, ammonium, zinc, iron, manganese, copper, boron, chlorine, iodine, molybdenum, selenium or sulfur.

This invention pertains to a process for manufacturing an iron-based nutrient composition comprising at least the steps of supplying an iron source and a phosphate source containing at least one polyphosphate, further comprising a mixing step of the iron source with the phosphate source. The iron source and phosphate sources being in their solid phase, the mixing of the two being solid-solid mixing, leading to the obtaining of a water-soluble, iron-based solid nutrient composition.

This invention pertains to a process for manufacturing an iron-based nutrient composition comprising at least the steps of supplying an iron source and a phosphate source containing at least one polyphosphate, further comprising a mixing step of the iron source with the phosphate source. The iron source and phosphate sources being in their solid phase, the mixing of the two being solid-solid mixing, leading to the obtaining of a water-soluble, iron-based solid nutrient composition.

This invention pertains to a process for manufacturing an iron-based nutrient composition comprising at least the steps of supplying an iron source and a phosphate source containing at least one polyphosphate, further comprising a mixing step of the iron source with the phosphate source. The iron source and phosphate sources being in their solid phase, the mixing of the two being solid-solid mixing, leading to the obtaining of a water-soluble, iron-based solid nutrient composition.

A particle that includes a core and one or more layers. The core includes a fertilizer element. The one or more layers may include a polycation polymer and/or a polyanion polymer. Compositions include a plurality of particles and methods of using the particles and compositions containing the same.