Magnesium (Mg) on plant

Magnesium is the central molecule in chlorophyll and is an important cofactor for the production of ATP. As Mg concentrations are sufficient in most Montana and Wyoming soils, Mg deficiencies are not common. Symptoms of Mg deficiency include interveinal chlorosis and leaf margins becoming yellow or reddish-purple while the midrib remains green. In wheat, distinct mottling as yellowish-green patches will occur, and alfalfa leaves may curl and have reddish undersides. Leaves of Mg deficient sugarbeets and potatoes are stiff and brittle and veins are often twisted. Reduced Mg concentrations in wheat forage can lead to grass tetany (low blood serum Mg) in animals grazing on winter wheat (Jacobsen and Jasper,1991).

Mn deficient wheat displaying interveinal chlorosis.