Analysis: 0-0-50-18S
Also known as SOP, or potassium sulphate, this product is produced with a variety of processes and source materials; however, most commonly, natural K-containing minerals (e.g., kainite and schoenite) are mined and rinsed with water and salt solutions to remove by-products, creating a concentrated form of K2SO4
Properties:
- Available in a variety of sizes (SGN)
- Granular
- Beige to light brown in colour
Advantages:
- Provides a source of sulphur as well as potash
- Excellent alternative to standard potash in crops/fields where chloride is a concern
- Certain unoiled forms of SOP are acceptable for use in certified organic operations. Consult the appropriate regulatory agency to verify before using SOP in organic systems
- Lower salt index vs. potash
Drawbacks:
- Softer granules can break down when handles/blended, creating dust and fines
- Water solubility is one-third of standard potash
Application methods:
- broadcast (surface applied)
