SCU
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A complete, balanced turf grass fertilization program has two parts: 

a quick-release nitrogen (such as urea) that is used for fast green-up and immediate feeding, and a slow-release formula that provides longer-lasting nourishment. Coating the urea with sulfur, an essential turf nutrient in its own right, makes slow/controlled release possible. Typically, sulfur-coated urea lasts for eight to 12 weeks, depending on environmental conditions. A sustained, slow release of sulfur and nitrogen helps the uptake of other nutrients essential for turf growth, color, and disease resistance. The slow / controlled release process also reduces the number of applications and greatly reduced turf burn potential caused by over application or overlapped coverage.

What is SCU ?                            

SCU, or Sulfur Coated Urea, is a controlled-release nitrogen fertilizer with a guaranteed analysis of 36% nitrogen 15% sulfur. To boost nitrogen content,some producers of sulfur-coated urea actually reduce coating thickness. The higher the nitrogen content, the thinner the coating. Sulfur-coated urea takes some pretty rough handling in loading, shipping, blending and bagging before it hits the ground and reaches the turf. The result? Coatings can break down or fracture and release all nitrogen at one time. This process yields highly uniform urea granules and pays off in better sizing and finished blends.

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Turf fertilized with SCU turns a rich, healthy green soon after application and keeps its color. Better fertilization comes from less gentrification, volatilization and leaching. In overall product quality, turf color, density and product uniformity.

How are nutrients released from SCU ?

Nutrients become available when the coating degrades to expose them or when nutrients diffuse through small pores in the coating. If all sulfur coated urea particles were identical, the release of nutrients would occur at the same time for each particle. Fortunately, coatings are not the same on all particles. Particles with thin of imperfect spots in the coating which are covered by the sealant have quick to moderate release rates. The longest delay in release comes from the thicker-coated particles with no imperfections. Thus, it is the variability in the particles that provides the sustained release of nutrients from SCU.

 

What is the residual of SCU ?

The exact feeding duration depends on the dissolution rate of the product, but basically half of the nutrients release in the first month and the remaining 50% release over the next two months.

 

What are the advantages of using SCU over using just urea?

SCU lasts longer so fewer applications are needed to maintain uniform quality turf. Using SCU reduces the risk of fertilizer burn and decreases the loss of nitrogen through leaching and volatilization. Fewer application and decreased nutrient loss means greater product efficiency, which usually more that justifies the higher cost of products which contain SCU.  

 What are the advantages of using SCU over other slow-release nitrogen sources?

The lower cost of nitrogen and the greater efficiency of applied nitrogen give SCU and economic advantage over the slow-release sources. Turf response from SCU is also quicker and more intense than response from other slow-release sources.

 

SPECIFICATIONS OF SULFUR COATED UREA (SCU):

 

Total Nitrogen                          36%

 Sulfur                                       15%

 Additive                                     5%

 Moisture                                 0.5%

 Main Size 2-4mm                    98%