The TurfReport™

Turf[TECH]Report: CRN: Controlled Release Nitrogen - What you don't know could BURN your turf!

Controlled Release Nitrogen (CRN) consists of uniform granules (usually urea-based) designed to release nitrogen into the soil over an extended time period.  This is as opposed to straight urea, which is considered to be ‘immediately available nitrogen.’  The mechanism for controlling the release of nitrogen is a physical barrier. Controlled release nitrogen is typically encapsulated by a combination one or more layers of polymer, sulfur and...