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Honeywell Sulf-N News: Adjusting Spreaders to Optimize Nutrient Distribution

Adjusting Spreaders to Optimize Nutrient DistributionDear Sulf-N Ambassador,A recent experiment by New Leader Equipment demonstrated the great importance of properly adjusting spreading machinery.It's no secret that a good, even application of fertilizer granules is essential to delivering the proper amount of nutrients to each plant in a field. Working with ammonium sulfate which makes it easy to differentiate between dark, green plants that have access to enough nitrogen and sulfur, and yellow plants that don't have access to enough of one or both of these nutrients can highlight uneven applications.In the experiment, Craig Fenstermaker, product manager for New Leader Equipment, points out the key attributes that govern spread width from spinners:
  • Density. The greater the mass of a particle, the more energy the spinner can impart on it. Heavy granules can be flung in a wider spread pattern than light ones can. Think of it as the difference between throwing a plastic wiffle ball and a regulation-sized baseball
  • Shape. Round granules experience less friction than square ones, which slide off the spinners. A rolling motion minimizes the friction between the particle and spinner, resulting in greater spread widths
  • Hardness. Equipment manufacturers determine adequate spinner speeds for fertilizer products based on their hardness. Powerful spinners rotating at higher-than-adequate speeds can pulverize granules. For Sulf-N ammonium sulfate, spinner speeds around 700 RPM are advisable
In comparing two settings on a New Leader ® 4000L spreader using mid-grade Sulf-N ammonium sulfate, Craig Fenstermaker found striking results:
  • Don't over-reach. Operating spinners at a speed of 850 RPM in an effort to create an 80-foot spread width pulverized the Sulf-N granules, resulting in a streaky, 65-foot spread pattern
  • Slow down. Slowing the spinners to 705 RPM also yielded a 65-foot spread width, but one with a beautifully even distribution curve
  • Blend for a boost. Blending mid-grade Sulf-N granules with phosphorus and potassium sources allowed Fenstermaker to extend the swath to 70 feet without compromising the even distribution of nutrients. The urea granules carried the Sulf-N granules the extra few feet
To learn more about mid-grade Sulf-N ammonium sulfate, as well as the soluble and granular grades, visit or contact your Honeywell representative.Regards,Mercedes GearhartAgronomy Manager, HoneywellIf you no longer wish to receive these emails, click on the following link: Unsubscribe