Magnesium is generally associated with crop quality issues, presumably because of the link between magnesium and potassium. Livestock farmers are aware of the risks of tetany or susceptibility to infection when it is deficient in fodder. Magnesium also plays a major role in plant nutrition.
In plants, the focus of its main activity is in chloroplasts, in chlorophyll, where photosynthesis takes place. It therefore directly influences the physiological characteristics of plants and their ability to capture carbon from the air and transform it into an organic form to produce biomass.