Without a proper balance of these two minerals, magnesium becomes depleted, which can result in the negative effects associated with lack of magnesium and a buildup of unassimilated calcium. (nationalnutrition.ca)
Potassium in the form of chemical fertilizers, or liming the soil, unless done with a magnesium limestone or dolomite, both cause such a severe lack of magnesium in food plants that magnesium deficiencies in humans have become widespread. (hawaiinaturopathicretreat.com)