Method of preparing fertilizers with retarded nutrient release

Details Method of preparing fertilizers with retarded nutrient release Method of preparing fertilizers with retarded nutrient release

1977-07-11

1979-03-06

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Organic material-containing

71 50, 71 53, 71 63, 71 64DA, 71 64E, 71 64F, 427212, C05C 900

Patent

active

041428854

ABSTRACT:
An improved process in the preparation of sustained release fertilizer compositions which comprises subjecting a preponderantly water-soluble granular fertilizer composition first to accretive granulation under accretive granulation conditions with a melt, solution or slurry of one or several fertilizers and in a second stage coating these treated grains with a suitable almost impermeable envelopment.

REFERENCES:
patent: 3295950 (1967-01-01), Blouin et al.
patent: 3400011 (1968-09-01), Fox
patent: 3408169 (1968-10-01), Thompson et al.
patent: 3725029 (1973-04-01), Blackmore

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