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Phosphorus guides

Starter fertilisers such as MAP and DAP, seed safety and phosphorus per dollar.

  • Close-up of green wheat heads against a blue sky, Victoria

    Phosphorus

    MAP vs DAP: choosing a starter fertiliser

    MAP and DAP both carry about 20–22% phosphorus. Compare nitrogen, seed safety near the seed, cost per kg of P and storage, with sources.

    Updated 18 October 2026