Timed release of water-soluble plant nutrients

Details Timed release of water-soluble plant nutrients Timed release of water-soluble plant nutrients

1995-03-24

1997-07-29

Lander, Ferris

Plant protecting and regulating compositions

Plant growth regulating compositions

71 28, 71 6406, 71 6407, 71 6411, A01N 2508, A01N 2510, C05C 900

Patent

active

056521960

ABSTRACT:
Products for the variable controlled release of water soluble agents are disclosed. The products have a core of water soluble agent and a first and second coating. The first coating has a permeability such that the agent can be released at a controlled rate, while the second coating has a relatively low water vapor transmission rate. Variation in the coating thicknesses and coating conditions result in nutrient release profiles which can be tailored to specific plant requirements. After application of the product, release of the agent is negligible, but after a predetermined time, e.g. one month or more, substantial release of the agent from the coated product begins. The product is particularly suitable for delayed, controlled release fertilizers.

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patent: 5435821 (1995-07-01), Duvdevani et al.

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