A phosphate fertilizer as described contains a blend of finely ground sulfur component, swelling agent and rock phosphate (for example, apatite). Preferably, the swelling agent is bentonite. The sulfur component, swelling agent and rock phosphate raw materials are preferably present as particles of less than about 500μ in size, more preferably between about 400-200μ, but more than 100μ. The sulfur component and swelling agent may be combined together before sizing as a composition of about 85 wt % sulfur sublimed onto/into or melted together with about 15 wt % bentonite. These components are present in the phosphate fertilizer at about 10 wt % for the sulfur, at about 5 wt % for the swelling agent and about 80 wt % for the rock phosphate. In addition, when the blend is pelletized, a granulation aid, like lignin, molasses, etc., is also present at about 5 wt % of the blend.

A phosphate fertilizer as described contains a blend of finely ground sulfur component, swelling agent and rock phosphate (for example, apatite). Preferably, the swelling agent is bentonite. The sulfur component, swelling agent and rock phosphate raw materials are preferably present as particles of less than about 500μ in size, more preferably between about 400-200μ, but more than 100μ. The sulfur component and swelling agent may be combined together before sizing as a composition of about 85 wt % sulfur sublimed onto/into or melted together with about 15 wt % bentonite. These components are present in the phosphate fertilizer at about 10 wt % for the sulfur, at about 5 wt % for the swelling agent and about 80 wt % for the rock phosphate. In addition, when the blend is pelletized, a granulation aid, like lignin, molasses, etc., is also present at about 5 wt % of the blend.

Methods and system for increasing the water solubility and availability of zinc in granular fertilizers using acid treatments. The treatment of granular fertilizers with an acidic solution increases an amount of water-soluble zinc, which in turn, increases the efficiency of zinc uptake and reduces the costs and equipment otherwise needed to mitigate zinc deficiencies.

Methods and system for increasing the water solubility and availability of zinc in granular fertilizers using acid treatments. The treatment of granular fertilizers with an acidic solution increases an amount of water-soluble zinc, which in turn, increases the efficiency of zinc uptake and reduces the costs and equipment otherwise needed to mitigate zinc deficiencies.

Fertilizer granules containing elemental sulfur and a hydrogel which expands or swells in the soil to more readily disperse the elemental sulfur surface throughout the soil, which increases the elemental sulfur surface area available for oxidation, and ultimately uptake of sulfur by the plant. The elemental sulfur and hydrogel can be added to a fertilizer composition as either an exterior coating or co-granulated with the base fertilizer composition.

Fertilizer granules containing elemental sulfur and a hydrogel which expands or swells in the soil to more readily disperse the elemental sulfur surface throughout the soil, which increases the elemental sulfur surface area available for oxidation, and ultimately uptake of sulfur by the plant. The elemental sulfur and hydrogel can be added to a fertilizer composition as either an exterior coating or co-granulated with the base fertilizer composition.

Fertilizer granules containing elemental sulfur and a hydrogel which expands or swells in the soil to more readily disperse the elemental sulfur surface throughout the soil, which increases the elemental sulfur surface area available for oxidation, and ultimately uptake of sulfur by the plant. The elemental sulfur and hydrogel can be added to a fertilizer composition as either an exterior coating or co-granulated with the base fertilizer composition.

Fertilizer granules containing elemental sulfur and a hydrogel which expands or swells in the soil to more readily disperse the elemental sulfur surface throughout the soil, which increases the elemental sulfur surface area available for oxidation, and ultimately uptake of sulfur by the plant. The elemental sulfur and hydrogel can be added to a fertilizer composition as either an exterior coating or co-granulated with the base fertilizer composition.

Plant fertilizer compositions, products, systems, kits, and methods. Products and methods for increasing the amount of soluble phosphorus in soil, solubilizing or increasing the level of soluble phosphorus and/or bioavailability of phosphorus in soil. Bioactivated fertilizer compositions and related methods for increasing phosphorus solubility and/or bioavailability in soil.

Plant fertilizer compositions, products, systems, kits, and methods. Products and methods for increasing the amount of soluble phosphorus in soil, solubilizing or increasing the level of soluble phosphorus and/or bioavailability of phosphorus in soil. Bioactivated fertilizer compositions and related methods for increasing phosphorus solubility and/or bioavailability in soil.