Urea formaldehyde, also known as urea-formaldehyde fertilizer, is the first commercially available slow-release nitrogen fertilizer. It is formed by the condensation of urea with formaldehyde and is white, odorless powder or granules.

Release mechanism:

It provides a slow release of nitrogen in a carbon-linked polymer with a lower salt index and nitrogen is slowly decomposed by moisture within 12 to 16 weeks. Healthy soils require a high proportion of microorganisms. Urea formaldehyde slow-release nitrogen can be consumed by microorganisms as nutrients and energy. A small proportion of nitrogen can be immediately supplied to plants by the solubility of water, and the remaining nitrogen is gradually released by microbial absorption and decomposition. This reliability and safety combine to make urea formaldehyde slow-release nitrogen suitable for projectable turfs of golf and other professional turf maintenance. More suitable for crops grown for more than 70 days.