Are K-Mag Fertilizer and elemental sulfur equal sulfur sources?
K-Mag has three nutrients in the sulfate, water-soluble form and does not affect the soil pH. Elemental sulfur is not water soluble. Soil microorganisms must digest the sulfur to convert it to a soluble, crop available form, which is a slow process. Sulfur from K-Mag is readily available, while sulfur from elemental sulfur is slowly available to the crop. Another characteristic of elemental sulfur, in many cases a strong disadvantage, is the strongly acidifying effect on the soil pH. Elemental sulfur has a high sulfur (S) content at about 90%.
