XCU’s coating is what makes it better. It is the only polymer-coated, sulfur-coated urea (PCSCU) with a polymer layer inside the protective surface layer. Lesser PCSCUs have a polymer or conditioner on the outside of the sulfur. XCU’s outer sulfur and wax layers work together to protect the inner polymer coating during the various stages of processing. The polymer layer inside XCU delivers a consistent nutrient release once the outer sulfur and wax layers absorb water.
XCU’s advanced coating technology adds durability and consistency so there is less granule breakage during blending and application. This means less quick release, less surge growth and longer residual feeding.
XCU releases nutrients the most consistently and steadily, so plants get optimal nutrient uptake. Other PCSCUs don’t deliver nutrients as evenly or as long, and often suffer from nutrient “lock-off” in which the sulfur coating is too thick to allow nitrogen to release in the expected time frame.
Locked-off PCSCU particles might sit for up to several years, during which time the nutrients are unavailable. The biggest drawback of locked-off particles is the inconsistency and diminished effectiveness of the fertilizer applications. Based on extensive lab tests, the superior slow release of XCU versus the leading competitor PCSCU is clear. (see chart below).
