Contains 3 percent available and 24 percent total phosphate. Organic rock phosphate provides phosphorous for all flowering plants. All natural and pelletized for easy application. Carrying a formulation of 0-3-0. Phosphate fertilizers are obtained from phosphorites of sedimentary or magmatic origin. Rock phosphates from some areas (e.g., Curacao) are low in fluorine, whereas those from other areas must be defluorinated before they can be used. Sedimentary phosphate rock usually is strip-mined and contains high concentrations of 238 U (800–5200 Bq/kg), 230 Th (200–16,000 Bq/kg), 232 Th (5–170 Bq/kg), and 226 Ra (25–900 Bq/kg). Mined from phosphorous rich natural deposits. Used as a soil conditioner. Comes in 7.25-pound bag. Soft Rock Phosphate should not be confused with Hard Rock Phosphate. Our CalPhos comes from phosphate rock mined in Florida, which was formed millions of years ago from the mineralized remains of marine creatures. Promotes root growth. Phosphate mined from rock mineral deposits is usually granulated for ease of application, it contains 20 percent phosphorous and 48 percent calcium, this can raise soil pH so use needs to be avoided if your soil is already alkaline. Rock phosphate contains about … As a mineral resource, “phosphate rock” is defined as unprocessed ore and processed concentrates that contain some form of apatite, a group of calcium phosphate minerals that is the primary source for phosphorus in phosphate fertilizers, which are vital to agriculture. Defluorination of rock phosphate is an industrial process that is suitable only for large-scale production. Soft rock phosphate, also called CalPhos or colloidal phosphate, is a great source of potassium and calcium for your plants.

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