Potassium deficiency in agricultural soils is a largely unrecognized but potentially significant threat to global food security if left unaddressed, finds new research involving researchers at UCL, University of Edinburgh and the UK Center for Ecology & Hydrology.
The soils in the deficient regions are not just deficient in bioavailable but also in the forms that would need to be liberated for plant use throughout the growing season. just look at the chemistry of a Brazillian or sub-Saharan Oxisol.