Comparing Potassium Sources for Crops | Protassium+®


What Does Your Potash Bring to the Table?

Protassium+ is the richest source of low-chloride potassium, providing the equivalent potassium content of 50% K2O, commonly referred to as potash. When comparing K sources, you must keep in mind chloride level, salt index and the addition of value-added nutrients.

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Minimize the harm

Compare Chloride Levels

Because Protassium+ is low in chloride (less than 1%) compared to many other potassium fertilizers, it minimizes the harmful impact chloride can have on your crops and soils. Excess chloride can reduce the uptake of vital nutrients, resulting in poor crop health, reduced yields and lower harvest quality.


Avoid the Burn

Reference the Salt Index

SOP has the lowest salt index per unit of K2O of all major potassium sources, helping you avoid many of the problems that salt poses to crop development and soil systems, including:

  • Poor germination
  • Water and nutrient imbalances
  • Seedling injury and "Tip Burn"
  • Stunted root and shoot growth
  • Reduced soil structure and decreased microbial activity

K + S

Value Added Nutrients

Other K sources like muriate of potash (MOP or KCl), potassium thiosulfate and potassium nitrate (KNO) contain high levels of unneeded and potentially damaging nutrients. Protassium+ is a unique dual-nutrient source, offering 50% potassium and 17% sulfur in the sulfate form—an essential secondary nutrient key to plant health.