OMRI listed for organic production. Created from a volcanic eruption entering seawater, capturing all of the minerals and trace elements that the sea and earth have to offer. AZOMITE is a fine powder that can be added to soil or feed to add minerals and nutrients in a safe natural dose. We recommend 44 lbs. per acre for micro nutrient deficiencies (less than 1 part per million) and 88 lbs. per acre for soils very deficient, especially those needing 1 ppm or more of Zinc and or Copper.