Education

The Superior Sulfur Source: SO4 Pelletized Gypsum

SO4 is the sulfur source that works in harmony with your crop’s needs—providing the right amount of sulfur, at the right time, for yield-maximizing plant growth.

Why SO4?

Superior Sulfur Release

SO4 supplies a strong initial release of sulfur followed by a steady supply throughout the growing season perfectly matching plant needs.

• Ammonium sulfate (AMS) is 300x more soluble, releasing sulfur too quickly.

• Elemental sulfur releases too slowly, delaying uptake.

• Only SO4 provides the ideal release profile to meet your crop’s needs throughout the growing season.

pH Neutral

Unlike other sulfur sources, SO4 is pH neutral—it won’t acidify your soil.
Maintaining proper pH improves nutrient availability, supports root health, and drives optimal yield potential.

Application Flexibility

SO4’s consistent pellet size makes it easy to blend and apply with other dry fertilizers.
Apply in spring, fall, or topdress—whenever it fits your operation. It’s sulfur that works on your schedule.

Proven Yield Increases with SO₄

Corn: +12.9 bu/A

• 126 trials across 7 Midwestern states

• Average rate: 152 lbs/A (26 units S)

• Result: +12.9 bu/A vs no sulfur
  🔗 Learn more about our SO4 corn trials

• 

Soybeans: +2.0 bu/A

• 62 trials across 32 Midwestern counties

• Average rate: 133 lbs/A (23 units S)

• Result: +2.0 bu/A vs no sulfur
  🔗 Learn more about our SO4 soybean trials

For more information about SO4 Pelletized Gypsum, contact your local Territory Sales Manager today!

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