Granular fertilizer composition having controlled release and pr

Details Granular fertilizer composition having controlled release and pr Granular fertilizer composition having controlled release and pr

1985-11-13

1987-04-14

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 6411, C05G 300, C05G 500

Patent

active

046575766

ABSTRACT:
Fertilizer composition in granular form having a regulated release of water-soluble fertilizer agents such as nitrogen, phosphorous, and potassium compounds. Each granule has a core comprising fertilizer substances having a known pH value, and a coating encapsulating the core. The coating is based on dicyclopentadiene and either linseed oil or a soy bean oil alkyd. The coating serves as a pH-regulator, so that for a core having a pH value below 6.0, the pH of the coating is regulated to be in the range of 6.0 to 9.0, while for a core having a pH value higher than 6.0 the coating includes a mixture of trace element compounds and has a pH value lying between 4.5 and 9.0.

REFERENCES:
patent: 3219433 (1965-11-01), Brewster et al.
patent: 3921333 (1975-11-01), Clendinning et al.

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