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Controlled release nitrogen fertilizers

, : Controlled release nitrogen fertilizers. Manual of Fertilizer Processing , Fertilizer Science and Technology Series, 5: 421-435

The types of commercial controlled release fertilizers used by the manufacturer of mixed fertilizers are: (1) processed natural organics; (2) the urea-formaldehyde family-solid ureaform, methyleneureas generated by in situ condensation, and urea-formaldehyde suspensions and solutions; (3) sulfur-coated urea; and (4) isobutylidenediurea from urea and isobutyraldehyde.

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