System for improving material release profiles

Details System for improving material release profiles System for improving material release profiles

1993-12-20

1995-12-19

Lander, Ferris

Chemistry: fertilizers

Processes and products

Organic material-containing

71 28, 71 29, 71 30, 71 6407, 71 6411, C05F 300, C05C 900, C05G 500

Patent

active

054765285

ABSTRACT:
Improved release profiles which can, for the first time, be customized to match requirements of systems including crop nutrient uptake are realized by providing a plurality of heterogeneous particles comprised of water-soluble constituents set in a matrix of water-insoluble materials, and further providing a continuous homogeneous barrier of same, or a different water-insoluble material, juxtaposed the peripheral surface of each such heterogeneous particle. A first alternate embodiment includes forming in situ reaction products to reduce the specific gravity of such heterogeneous particles. In a second alternate embodiment, there is substituted for all, or a portion of such water-soluble material, organic media comprised primarily of composted poultry litter wherein soluble iron values remain available for substantial periods of time without incorporating or utilizing expensive conventional synthetic chelating agents.

REFERENCES:
patent: 4299613 (1981-11-01), Cardarelli
patent: 4857098 (1989-08-01), Shirley, Jr.

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