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.
Just seen that North America fertilizer prices have halved from the peak. Still somewhat above 10 year average though. I wonder what the price of crushed basalt/diabas is. It’s energy intensive to produce and transport. Zero nitrates and phosphates, of course.