Chloride & Salt Sensitivity in Potatoes | Protassium+®


A Better Low-Chloride Source of K

Potatoes are among several high-value crops that are particularly sensitive to chloride and salt. Continued application of potassium sources with a high chloride content or salt index can have a toxic effect, building up in the soil and contributing to lower yields, lower quality and lost income.

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Blocking uptake

The Risk of High Chloride

Protassium+ ® potassium fertilizer contains less than 1% chloride, minimizing the risk chloride poses to potato crops. Applying high-chloride potassium sources can cause excess chloride to build up around a plant’s root system, blocking uptake of essential nutrients like nitrogen and sulfate that contribute to healthier, heartier crops.


Soil toxicity

The Threat of Salt

Excess salt can have a number of damaging effects on crop development and soil systems, including:

  • Nutritional imbalances and poor germination
  • Seedling injury and “tip burn”
  • Stunted root and shoot growth
  • Nutrient displacement

Avoid the risk

Comparing Salt Indexes

When comparing fertilizers per unit of K2O, Protassium+ premium sulfate of potash has the lowest salt index of all major potassium sources.  For this reason, Protassium+ SOP provides added flexibility in application timing without the risks of salt buildup that over-application or continued application of other potassium sources can pose over time.