By Dr. J. Julian Smith, Ph.D. & Jim Thomas, Director of Specialty Products
Overview of potassium nutrition in plants:
I believe that potassium (K) is probably the most underrated macro-nutrient in plant physiology – nitrogen and phosphorous garnering the bulk of attention in research circles at least. The original work in England back in the1800’s indicated a flush of growth in the piles of burnt wood after field clearing. This was later attributed to potassium nutrition and subsequently produced for farms accordingly by incinerating wood in crucibles, hence “pot ash”.