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.
This is a really good overview of what we’re looking at in the near future https://www.collapsemusings.com/7-reasons-theres-going-to-be-a-global-famine/