Granular fertilizer composition having controlled release...

Details Granular fertilizer composition having controlled release... Granular fertilizer composition having controlled release...

C - Chemistry, Metallurgy

05

G

71/47

C05G 3/00 (2006.01) B01J 2/30 (2006.01)

Patent

CA 1256710

GRANULAR FERTILIZER COMPOSITION HAVING CONTROLLED RELEASE AND PROCESS FOR THE PREPARATION THEREOF Abstract of the Disclosure 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 9Ø

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