Soil Testing, Potassium, and Plant Nutrition

A recent article out of the University of Illinois called into question the whole idea of soil testing for Potassium, and the need for Potassium fertilizers.

Response from other knowledgeable sources has called their premise into question and debunked some of what they were saying.  This article is out of the International Plant Nutrition Institute.  Click on their link if you want the details.  Emerson Nafziger debunks his own department in this article. You may recall that I weighed in on the issue as well.  We are going to continue to recommend potassium fertilizer on soils that have low soil test levels.  We are going to continue to test frequently and make adjustments as needed.