A composition comprising at least one superabsorbent polymer and at least one water soluble phosphate and optionally a plant advantageous additive.

A composition comprising at least one superabsorbent polymer and at least one water soluble phosphate and optionally a plant advantageous additive.

An anti-caking agent for soil includes, as effective ingredients: a lignin having a molecular weight peak, as measured by GPC molecular weight analysis using a UV detector at a wavelength of 254 nm, within the molecular weight range of 10,000 to 40,000; and a diatomaceous earth. A method of improving the growth of a plant uses the above described anti-caking agent for soil. The anti-caking agent for soil has the effect of reducing the caking of soil and improving the poor growth of a plant.

An anti-caking agent for soil includes, as effective ingredients: a lignin having a molecular weight peak, as measured by GPC molecular weight analysis using a UV detector at a wavelength of 254 nm, within the molecular weight range of 10,000 to 40,000; and a diatomaceous earth. A method of improving the growth of a plant uses the above described anti-caking agent for soil. The anti-caking agent for soil has the effect of reducing the caking of soil and improving the poor growth of a plant.

Disclosed is a potassium humate sulfur compound granule and process for making the same granule. The potassium humate sulfur compound granule including a potassium humate component and an elemental sulfur component at a ratio of about 1:20; where the potassium humate component of the granule fully solubilizes upon application to a desired site and enhances conversion of the sulfur component into sulfate by at least about 15% as compared to elemental sulfur alone.

Disclosed is a potassium humate sulfur compound granule and process for making the same granule. The potassium humate sulfur compound granule including a potassium humate component and an elemental sulfur component at a ratio of about 1:20; where the potassium humate component of the granule fully solubilizes upon application to a desired site and enhances conversion of the sulfur component into sulfate by at least about 15% as compared to elemental sulfur alone.

The invention discloses a method for the preparation and use of a slow-release iron-based biochar soil heavy metal passivator. The slow-release iron-based biochar soil heavy metal passivator of the present invention is prepared by an one-step method, wherein iron-based biochar, kaolin and a biological starch are mixed into a core material in a specific ratio; an acidic silica sol and a chitosan solution are prepared, under the effects of an alkaline catalyst and an emulsifier, as a chitosan and silica-sol composite material as a coating, and the iron-based biochar is coated with the alkaline coating material, with the core material and the coating material being controlled at a certain volume ratio. The passivator has a wide raw material source, a simple and convenient preparation process, easy industrialized production, and can passivate the heavy metal arsenic and cadmium efficiently and inhibit the absorption and accumulation of arsenic and cadmium. The passivator prepared by the present invention can last for 4 growing seasons and has a higher passivation efficiency and a longer action time than common iron-based biochar passivators. The passivator can be widely used in the control of arsenic and cadmium pollution farmland.

The invention discloses a method for the preparation and use of a slow-release iron-based biochar soil heavy metal passivator. The slow-release iron-based biochar soil heavy metal passivator of the present invention is prepared by an one-step method, wherein iron-based biochar, kaolin and a biological starch are mixed into a core material in a specific ratio; an acidic silica sol and a chitosan solution are prepared, under the effects of an alkaline catalyst and an emulsifier, as a chitosan and silica-sol composite material as a coating, and the iron-based biochar is coated with the alkaline coating material, with the core material and the coating material being controlled at a certain volume ratio. The passivator has a wide raw material source, a simple and convenient preparation process, easy industrialized production, and can passivate the heavy metal arsenic and cadmium efficiently and inhibit the absorption and accumulation of arsenic and cadmium. The passivator prepared by the present invention can last for 4 growing seasons and has a higher passivation efficiency and a longer action time than common iron-based biochar passivators. The passivator can be widely used in the control of arsenic and cadmium pollution farmland.

A method is described for improving water retention in soil, which involves mixing a super absorbing resin (SAR) composite with the soil. The SAR composite comprises a natural pozzolan and at least one polymer or copolymer. The SAR composite may be in the form of granules having an average longest dimension of 0.2-10 mm, though the SAR composite may be pelletized or formed in other sizes. The SAR composite may release water at a faster rate in a soil when exposed to drought conditions.

A method is described for improving water retention in soil, which involves mixing a super absorbing resin (SAR) composite with the soil. The SAR composite comprises a natural pozzolan and at least one polymer or copolymer. The SAR composite may be in the form of granules having an average longest dimension of 0.2-10 mm, though the SAR composite may be pelletized or formed in other sizes. The SAR composite may release water at a faster rate in a soil when exposed to drought conditions.