A fertilizer granule containing a core containing a plant nutrient; and a coat containing 55 wt. % to 90 wt. % of a poly butylene succinate adipate (PBSA), 10 wt. % to 45 wt. % of a second polymer selected from poly lactic acid (PLA), poly butylene succinate (PBS), or a combination or blend of PLA and PBS, and 0 wt. % to 30 wt. % of a wax based on the total weight of the coat, the coat forming a coating on an outer surface of the core and methods of making and using the fertilizer granule. Also a coating composition containing 55 wt. % to 90 wt. % of a PBSA and 10 wt. % to 45 wt. % of a second polymer selected from PLA, PBS, or a combination or a blend of PLA and PBS, and 0 wt. % to 30 wt. % of a wax.

A fertilizer granule containing a core containing a plant nutrient; and a coat containing 55 wt. % to 90 wt. % of a poly butylene succinate adipate (PBSA), 10 wt. % to 45 wt. % of a second polymer selected from poly lactic acid (PLA), poly butylene succinate (PBS), or a combination or blend of PLA and PBS, and 0 wt. % to 30 wt. % of a wax based on the total weight of the coat, the coat forming a coating on an outer surface of the core and methods of making and using the fertilizer granule. Also a coating composition containing 55 wt. % to 90 wt. % of a PBSA and 10 wt. % to 45 wt. % of a second polymer selected from PLA, PBS, or a combination or a blend of PLA and PBS, and 0 wt. % to 30 wt. % of a wax.

Improved, micronutrient-supplemented polymeric seed coatings are provided which include at least one polyanionic polymer in combination with respective amounts of Zn, Mn, and Cu micronutrients. Preferably, the coatings comprise polyanionic polymers having a backbone comprising dicarboxylic repeat units with Zn, Mn, and Cu bound to the backbone. The most preferred polymers contain maleic and itaconic repeat units, optionally with sulfonate repeat units. The invention also provides a method of treating seeds using the coatings, and coated seed products.

A coated fertilizer comprises a fertilizer granule; and a coating disposed on a surface of the fertilizer granule, wherein the coating comprises a poly(lactic acid); a second polymer comprising a poly(butylene succinate), a cellulose triacetate, or a combination comprising at least one of the foregoing; and a sealant. Methods of making the coated fertilizer are also disclosed.

Fertilizer particles containing a core and a shell is described. The core can contain urea, a pH buffering agent, and an urease inhibitor, and the shell can contain urea and can cover at least a portion of an outer surface of the core. The core can include 20 wt. % to 80 wt. % urea, based on the total weight of the core, and the shell can include 50 wt. % to 100 wt. % urea, based on the total weight of the core.

A method of reducing dust formation and caking in fertilizer comprising coating the fertilizer in a bituminous emulsion. The coating may comprise bitumen, cutback bitumen, or a combination of bitumen and cutback bitumen comprising 20-100% bitumen. The bitumen, cutback bitumen, or combination thereof may be emulsified with water prior to being sprayed on the fertilizer.

A particle is provided for delivery of humics, and biochar that is water-dispersible into constituent granules. The resulting particles are amenable to broadcast application, for example via rotary or drop spreader. As a result, a dust-free particle is formed that simultaneously addresses the prior art problems of the friable nature of humics and the sooty dusting property of biochar to facilitate ease of handling, broadcast field spreading, and gain the synergistic effects of dosing soil with both humics and biochar. The particle provides improved storage capabilities for materials improving the quality of the delivered material and decreasing negative storage consequences such as odor emanation or degradation. The resulting particles upon dispersion have a pH of between 3.3 and 8.1.

A system and method are provided for manufacturing the polymer-coated fertilizers with a controlled release in a single pass. The system has a feeding mechanism connected to a first chill roll to supply the articles to the first cavities provided on the first roll to store and hold the articles. A first machine produces and applies a first polymer film on the articles held in the first chill roll to coat the articles partially with the first polymer film. The partially coated articles are transferred to a second chill roll placed at a side or on a top of the first chill roll. A second machine produces and applies the second polymer film on the partially coated articles in the second chill roll so that the articles are encapsulated by the first and second polymer films. A collector mechanism receives the encapsulated articles from the second chill roll.

A curing agent isocyanate of a fully bio-based coating material for a polyurethane controlled release fertilizer is a bio-based 1,5-pentane diisocyanate compound. The bio-based 1,5-pentane diisocyanate compound is a compound of a bio-based 1,5-pentane diisocyanate monomer and its polymer, or a compound of different bio-based 1,5-pentane diisocyanate polymers. The bio-based PDI (1,5-pentane diisocyanate) polymer comprises a bio-based PDI trimer and its derivatives, a bio-based PDI tetramer and its derivatives, and other bio-based PDI multimers and their derivatives, which are derived from bio-based materials such as glucose and lysine. The mass percentage of bio-based materials in all raw materials is in a range of 65% to 71%. The coating material is prepared by cross-linking the bio-based polyol and the bio-based 1,5-pentane diisocyanate compound.

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.