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Abstract

Phosphogypsum is a by-product of the manufacture ofphosphoric acid from phosphate rock and is a potential source of sulfur and calcium for crops. There are currently more than 700 million Mg of phosphogypsum in Florida alone stacked in waste piles and an additional 30 million Mg produced annually. A field study was conducted to determine whether addition ofphosphogypsum to bahiagrass would increase production and quality. Results indicate that addition ofup to 4.0 Mg/ha phosphogypsum increased bahiagrass yields, protein content. and in vitrodigestibility offorage. This study has demonstrated that phosphogypsum can be used as an alternative source of sulfur and calcium for forage crops.

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