The present invention discloses a method for safe production of rice on soil mildly and moderately polluted by heavy metals. The method includes applying a passivator before transplanting rice seedlings to reduce activity of heavy metals in soil, and then spraying a foliar barrier from the peak tillering stage to the booting stage of rice and at the filling stage of rice; the passivator includes bentonite, gypsum powder, lime, a biochar, an iron-based biochar, a slow-release iron-based biochar, an iron-sulfur-silicon composite biochar, a heavy metal cadmium passivator and a cadmium-arsenic synchronous passivator for activating sulfur reducing bacteria in paddy soil; and the foliar barrier includes an acid silica sol, a selenium-silicon composite sol, a cerium composite silica sol, a ferrous modified selenium sol. The method can also include applying a nitrate nitrogen fertilizer at the seedling stage of rice, and/or applying a phosphorus potassium fertilizer at the tillering stage of rice.

A controlled release fertilizer has been prepared comprising a nutrient core coated with one or more moisture barrier coatings, at least one of said moisture barrier coatings comprising: at least one polyethylene wax; and a thermoset polyurethane from the reaction of a polyol and a polyisocyanate. The weight ratio of thermoset polyurethane to polyethylene wax is from about 50:50 to about 98:2. The polyethylene wax is heated above the melt point of the polyethylene wax and mixed and dispersed into the polyol component of the thermoset polyurethane in a ratio of 90-70% polyol to 10-30% polyethylene wax before the thermoset polyurethane-forming mixture is applied to the surface of the nutrient core and cured. A coating of a high temperature microcrystalline wax can be applied prior to final curing of the thermoset polyurethane to the coated nutrient core particles.

A controlled release fertilizer has been prepared comprising a nutrient core coated with one or more moisture barrier coatings, at least one of said moisture barrier coatings comprising: at least one polyethylene wax; and a thermoset polyurethane from the reaction of a polyol and a polyisocyanate. The weight ratio of thermoset polyurethane to polyethylene wax is from about 50:50 to about 98:2. The polyethylene wax is heated above the melt point of the polyethylene wax and mixed and dispersed into the polyol component of the thermoset polyurethane in a ratio of 90-70% polyol to 10-30% polyethylene wax before the thermoset polyurethane-forming mixture is applied to the surface of the nutrient core and cured. A coating of a high temperature microcrystalline wax can be applied prior to final curing of the thermoset polyurethane to the coated nutrient core particles.

The present disclosure relates to the field of agrochemical compositions and formulations. In an aspect, the present disclosure provides for a composition in combination with a fibril or microfibril or nanofibril structuring agent. In yet another aspect, the disclosure provides for a composition comprising: (a) an agricultural bioactive material, a fungicide, insecticide, herbicide, and/or plant growth regulator; (b) a fibril or microfibril or nanofibril structuring agent; and (c) optionally, an auxiliary surface active agent. The disclosure further provides for a comprising a composition described herein mixed or combined with a liquid fertilizer.

The present disclosure relates to the field of agrochemical compositions and formulations. In an aspect, the present disclosure provides for a composition in combination with a fibril or microfibril or nanofibril structuring agent. In yet another aspect, the disclosure provides for a composition comprising: (a) an agricultural bioactive material, a fungicide, insecticide, herbicide, and/or plant growth regulator; (b) a fibril or microfibril or nanofibril structuring agent; and (c) optionally, an auxiliary surface active agent. The disclosure further provides for a comprising a composition described herein mixed or combined with a liquid fertilizer.

Disclosed herein is a composition comprising fertilizer particles being coated with at least two layers of superabsorbent polymers such that leachate of nitrogen in the soil is substantially decreased.

Disclosed herein is a composition comprising fertilizer particles being coated with at least two layers of superabsorbent polymers such that leachate of nitrogen in the soil is substantially decreased.

The invention provides compositions, systems and methods for controlling loss of nutrients and other substances from planting sites.

The invention provides compositions, systems and methods for controlling loss of nutrients and other substances from planting sites.

The invention provides compositions, systems and methods for controlling loss of nutrients and other substances from planting sites.