About POLY4

Polyhalite is a naturally occurring evaporite mineral which contains four of the six macro nutrients that are essential to plant growth; potassium (14% K2O), sulphur (19% S), magnesium (6% MgO) and calcium (17% CaO).

POLY4's chemical formula: K2SO4 MgSO4 2CaSO4 2H2O.

POLY4 delivers four essential macro nutrients in one simple product. Available in granulated, powdered or chipped form, POLY4 is suitable for use on both high value and broad acre crops.

Now into our sixth year of trials, the scope and scale of the research demonstrates our long-term commitment to further developing the agronomic understanding of POLY4.

Independent laboratory results have ratified the benefits of the POLY4's physical and chemical characteristics. Find out more about these characteristics by clicking on the icons below.

Nutrient Release

Sirius Minerals’ global Research and Development programme provides technical, agronomic and commercial validation for POLY4’s use as an effective multi-nutrient fertilizer suitable for widespread use in commercial farming.

Our ongoing programme, conducted in partnership with leading agricultural universities, research institutions and commercial associates, operates across five continents. So far, we have directed over 200 trials on 26 crops in 17 different countries.

These studies tested POLY4 on broad acre and high value crops directly against other potassium based fertilizers, both as a straight comparison and as a component in a NPK blend. Results consistently show that POLY4 outperforms muriate of potash (MOP) and sulphate of potash (SOP) in both crop yield and quality, demonstrating the agronomic advantage provided by POLY4's multi-nutrient content.

Results from of our programme can be found by clicking on the crop icons below.

An interactive section that helps to visualise the crop trials around the globe

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Click on a country or use the dropdowns below to find out which crops have been trialled as part of our global agronomy programme.

Brazil
  • Coffee
  • Corn
  • Potato
  • Soybean
  • Sugar Cane
  • Tomato
  • Carrots
Poland
  • Wheat
Canada
  • Corn
  • Soybean
Tanzania
  • Corn
  • Tomato
  • Tea
  • Rice
  • Tobacco
China
  • Corn
  • Cotton
  • Oilseed Rape
  • Peanuts
  • Rice
  • Tea
  • Wheat
  • Chilli Pepper
  • Tobacco
USA
  • Cabbage
  • Chilli Pepper
  • Corn
  • Cotton
  • Canola
  • Grapes
  • Onion
  • Peanuts
  • Peppers
  • Potato
  • Sorghum
  • Soybean
  • Sugar Cane
  • Tomato
  • Wheat
  • Tobacco
Colombia
  • Coffee
UK
  • Barley
  • Celery
  • Corn
  • Cotton
  • Grass
  • Oilseed Rape
  • Potato
  • Forestry
Equador
  • Potato
  • Rice
France
  • Wheat
India
  • Cotton
  • Onion
  • Tomato
  • Potato
  • Corn
  • Peanuts
  • Mustard
Malaysia
  • Oil Palm
Turkey
  • Oilseed Rape
  • Wheat
Nigeria
  • Oil Palm

Market Opportunity

Jump to Market Potential

Market Potential

POLY4 has significant market potential, which we have established through our global sales & marketing strategy. We will continue to develop global markets, making the product widely available through established distribution channels.

The size of the market opportunity for POLY4 is framed in three key areas – as a substitute for existing products, to supply a growing multinutrient demand and as a premium product – and is outlined below.

Product substitution opportunities

The contestable market opportunity for POLY4 as a substitute for existing products will be 376 Mtpa in 2018, far in excess of the Project's 20 Mtpa full production capacity.

Market growth potential

The increasing demand for key attributes of POLY4, such as its suitability for use on chloride sensitive crops and its ability to address sulphur and magnesium soil deficiencies, accounts for a total 130 Mtpa of POLY4 demand potential.

Premium performance

The demand for premium, multinutrient fertilizers, like POLY4, continues to lead the global fertilizer market in terms of demand and exceptional performance in the field.

Jump to The Polyhalite Archive

The Polyhalite Archive

Click on the link below to find out more about the use of polyhalite as a multi-nutrient fertilizer. This section contains presentations, journal articles, papers and other pieces of insight from across the industry and our own global research and development programme.

  1. Conducted in: 2017
    Albaderin et al : Ireland
    Granulated polyhalite fertilizer caking propensity
    PDF
  2. Conducted in: 2016
    ASA : Usa
    The influence of polyhalite on club root and soil structure
    PRESENTATION
  3. Conducted in: 2016
    ASA : Usa
    Polyhalite as a potassium fertilizer
    PRESENTATION
  4. Conducted in: 2016
    Kemp et al : Uk
    Characterising potash-bearing evaporate deposits evidenced in North Yorkshire
    PDF
  5. Conducted in: 2016
    Sutradhar et al : Usa
    Polyhalite as a source of potassium and sulphur for a corn-soybean rotation
    PDF
  6. Conducted in: 2016
    BSSS : Uk
    The effect of polyhalite on soil physical properties
    PDF
  7. Conducted in: 2015
    ASA : Usa
    The agronomic properties of polyhalite
    PRESENTATION
  8. Conducted in: 1991
    K.A Barbarick : Usa
    Polyhalite application to sorghum-sudangrass and leaching in soil columns
    PDF
  9. Conducted in: 1989
    K.A Barbarick : Usa
    Polyhalite as a potassium fertilizer
    PDF
  10. Conducted in: 1932
    G.S Fraps, Texas, : Usa
    Availability to plants of potash in polyhalite
    PDF