The K Source that Brings More to the Table

Protassium+® is a dual-nutrient source that delivers high potassium and sulfate sulfur with virtually no chloride and low salt index. It is the premium K source that helps your crops grow to their full potential.

Why Protassium+

The Right K Source for the Best Reasons

News & Insight

Potato News

Gain information and insight on current developments in the industry.

Topic: potatoes

August 31, 2014

Apply Potassium at Hilling to Increase Potato Yields and Quality

Potatoes naturally have a very high need for potassium (K) -- often as much as 300 pounds K2O per acre for a typical large crop…

Topic: potatoes

August 31, 2014

Preventing Potassium Deficiency is Key to Potato Yields

Smart fertility management is critical to the success of any potato crop, and in the plants' early growth stages, that's especially true of potassium. The…

Topic: potatoes

August 31, 2014

5 Essential Tips for Scouting Nutrient Deficiency

Timing is critical when scouting because once the signs of nutrient deficiency are clearly visible, it means the crop has already been stressed. Don't put…

Topic: potatoes

August 31, 2014

Nutrient Management and Specific Gravity

Tuber specific gravity has a strong relationship with starch content, total solids, and mealiness (cooking quality). Low specific gravity in tubers can affect processing and…


Calculate Your K Uptake

Get an idea of how much potassium was depleted from your soil and how much Protassium+ you will need for replenishment.


Research & Insights

Plant Nutrition Research

...Protassium+ SOP delivered a 5.1 ton (100 cwt) increase per acre and more U.S. #1s than other K sources.[1]