Slow release nitrogen seed coat

A plant seed having an adherent coating thereon comprising an adhesive binder and a particulate urea-formaldehyde polymer having a particle size substantially between 1 and 150 microns, wherein the adhesive binder is applied to the seed as a latex and dried and wherein the particulate urea-formaldehyde polymer is made by acidifying an aqueous methylol urea solution, wherein the aqueous methylol urea solution either contains a dispersing agent or is subjected to a high shear condition during the acidifying, to form an aqueous dispersion of insoluble urea-formaldehyde polymer particles and drying the dispersion to recover the urea-formaldehyde polymer particles.

A plant seed having an adherent coating thereon comprising an adhesive binder and a particulate urea-formaldehyde polymer having a particle size substantially between 1 and 150 microns, wherein the particulate urea-formaldehyde polymer is made by acidifying an aqueous methylol urea solution made by reacting urea and formaldehyde at a urea:formaldehyde mole ratio of 0.95:1 to 1.05:1 and wherein the methylol urea solution contains a dispersing agent during the acidifying.

A method of enhancing the growth and development of a plant grown from seed comprising providing said seed with an adherent coating thereon comprising an adhesive binder and a particulate urea-formaldehyde polymer prior to planting said seed, wherein the particulate urea-formaldehyde polymer comprises from 50% to about 99% by weight of the adherent coating.

A method of enhancing the growth and development of a plant grown from seed comprising providing said seed with an adherent coating thereon comprising an adhesive binder and a particulate urea-formaldehyde polymer having a particle size substantially between 1 and 150 microns prior to planting said seed, wherein the adhesive binder is applied to the seed as a latex and dried and wherein the particulate urea-formaldehyde polymer is made by acidifying an aqueous methylol urea solution, wherein the aqueous methylol urea solution either contains a dispersing agent or is subjected to a high shear condition during the acidifying, to form an aqueous dispersion of insoluble urea-formaldehyde polymer particles and drying the dispersion to recover the urea-formaldehyde polymer particles.

A method of enhancing the growth and development of a plant grown from seed comprising providing said seed with an adherent coating thereon comprising an adhesive binder and a particulate urea-formaldehyde polymer having a particle size substantially between 1 and 150 microns prior to planting said seed wherein the particulate urea-formaldehyde polymer is made by acidifying an aqueous methylol urea solution made by reacting urea and formaldehyde at a urea:

• formaldehyde mole ratio of 0.95:1 to 1.05:1 and wherein the methylol urea solution contains a dispersing agent during the acidifying.

A plant seed having an adherent coating thereon comprising an adhesive binder and a particulate urea-formaldehyde polymer having a particle size substantially between 1 and 150 microns, wherein the particulate urea-formaldehyde polymer is made by acidifying an aqueous methylol urea solution, wherein the aqueous methylol urea solution either contains a dispersing agent or is subjected to a high shear condition during the acidifying, to form an aqueous dispersion of insoluble urea-formaldehyde polymer particles.

A method of enhancing the growth and development of a plant grown from seed comprising providing said seed with an adherent coating thereon comprising an adhesive binder and a particulate urea-formaldehyde polymer having a particle size substantially between 1 and 150 microns prior to planting said seed, wherein the particulate urea-formaldehyde polymer is made by acidifying an aqueous methylol urea solution, wherein the aqueous methylol urea solution either contains a dispersing agent or is subjected to a high shear condition during the acidifying, to form an aqueous dispersion of insoluble urea-formaldehyde polymer urea-formaldehyde polymer particles have a size between 1 and 150 microns.

A method for making a coated plant seed having an adherent coating of a particulate urea-formaldehyde polymer thereon comprising contacting a plant seed with an adhesive binder and with a particulate urea-formaldehyde polymer having a particle size substantially between 1 and 150 microns.