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North America

Sirius Minerals’ crop science programme carries out trials in North America including Canada and United States.

Agricultural driver

Sulphur, magnesium and potassium deficiencies in major agricultural areas.


Crop output from the region is expected to increase by 10%, led by corn and soybean.

Need for POLY4

Large regions of North America grow crops that are sensitive to chloride toxicity. Over eight million hectares of chloride sensitive crops are produced in the United States alone. POLY4 is a premium specification product that supplies essentially chloride-free potassium, along with sulphur, magnesium and calcium.

Read more about findings of our trials in this region by clicking the icons below.

Regional soil challenges

  • Deficient in one nutrient supplied by POLY4
  • Deficient in two nutrients supplied by POLY4
  • Deficient in three nutrients supplied by POLY4
  • No data/deficiencies

POLY4 | Growing corn in North America

POLY4 — research and development

POLY4 — a game-changing product

POLY4 — supporting US farmers