Potassium Sources for Alfalfa | Protassium+®


The Right Source

When choosing the right potassium source for your alfalfa, it pays to take a closer look at what you’re actually getting for your money. Some of the factors you’ll want to consider include potassium content, value-added nutrients, salt content, risks in over-application, application costs, yield performance and forage quality.

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A Rich K Source

The Advantage of Protassium+ Sulfate of Potash (SOP)

Protassium+® potassium fertilizer is the richest source of low-chloride potassium, providing an equivalent content of 50 percent K2O, commonly referred to as potash.


Less Worry

Virtually Chloride Free

Because Protassium+ fertilizer is low in chloride (less than one percent) compared to many other potassium fertilizers, it minimizes the harmful impact that soil salt buildup can have on your alfalfa. Excess chloride in the soil can reduce plants' uptake of vital nutrients like nitrogen, sulfur, phosphorus, boron and others, which often takes a heavy toll on yields and forage quality.

Some potassium sources such as muriate of potash (MOP) contain high levels of unneeded and potentially harmful chloride. In salt-sensitive crops, Protassium+ SOP is clearly the preferable option.


Sulfate Sulfur

Value Added Nutrients

Sulfur helps support plant functions that can affect yield, quality and marketability.

Signs of sulfur deficiency in plants can range from the plant turning a lighter green color to a yellowing and upward curving of the leaves. Slowed growth rates, delayed maturity, and spindly plants can be a result. 

Protassium+  fertilizer offers 17% sulfate sulfur, making it easy for you to replenish and maintain proper S levels. Protassium+ sulfate of potash offers sulfur in the sulfate form (SO4-2), which is the only form of sulfur that is immediately available for plant uptake.


Avoid the Burn

Low Salt Index

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

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

While heavy application of many other potassium sources may contribute to potentially dangerous soil salt build-up, the low salt index of Protassium+ premium sulfate of potash minimizes this risk. It also gives you added application flexibility and more peace of mind about the health of your crop.