Controlled release fertilizer and preparations thereof

Details Controlled release fertilizer and preparations thereof Controlled release fertilizer and preparations thereof

1996-08-09

1998-12-15

Langel, Wayne

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 28, 71 29, 71 30, 71 31, 71 32, 71 33, 71 34, 71 35, 71 36, 71 6411, C05G 500

Patent

active

058490604

ABSTRACT:
The present invention relates to a controlled release fertilizer having water-soluble fertilizers as nucleus and limited-soluble plant nutrient compounds as coating layers, characterized in that more than two coating layers of limited-soluble compounds are formed around the nucleus, and that the release rates of the fertilizer can be controlled by regulating the solubilities of the limited-soluble compounds. The invention also relates to a process for preparing the controlled release fertilizer.

REFERENCES:
patent: 4804403 (1989-02-01), Moore
Zhang Baolin et al., "Luxuriance: A slow-acting compound fertilizer from China", Nitrogen No. 191 (May/Jun. 1991).

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