Green-T® Kelp Iron with Manganese & Fulvic that is in the desirable 3:1 ratio. This 3:1 ratio of iron to manganese is ideal to promote naturally deep green turf. Iron and manganese act as an enzyme to promote chlorophyll development within the turf blade and influence photosynthesis. The acid-based technology utilized in Green-T® Kelp Iron with Manganese & Fulvic Acid aids in dissolving bicarbonates which, in turn, makes nutrients more available to the turf.