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Polysulphate® fertilizer comes from the Polyhalite layer of rock, over 1000m below the North Sea off the North Yorkshire coast in the UK. Deposited 260 million years ago, it lies 150-170m below the potash seam at the ICL UK Boulby Mine. It contains four nutrients which makes it a unique product: sulphur, potassium, magnesium,and calcium. Its nutrients are readily available for plant uptake.
Unlike blended or compound fertilizer, Polysulphate® is available in its natural state. It is mined, crushed, screened and bagged, involving no chemical separation or other industrial processes.
Field experiments conducted worldwide using Polysulphate® have demonstrated its efficacy in increasing crop yields and crop quality. The results have also indicated greater efficiency than standard sources of potassium and magnesium sulphates, as well as gypsum, with significant increases in yields.
Crop productivity and crop quality are the most well-known major benefits of applying Polysulphate. Now the added benefit of low carbon footprint is set to make Polysulphate a fertilizer of choice for those farmers carrying out carbon counting on their enterprise and wanting to lower their carbon footprint.
Perhaps the most significant aspect of Polysulphate® is its low environmental impact. Polysulphate® requires no processing and creates no waste products. The mineral is mined, crushed, screened and bagged with no chemical intervention or process. It therefore has a low carbon footprint fertilizer and helps farmers reach industry carbon targets.
ICL concluded a full Carbon Footprint analysis for Polysulphate [pdf] and has compared the findings to other common fertilizers. The calculated global warming potential value for Polysulphate is 0.034 kg CO2e per kg of product. This value was found to be the lowest out of a group of leading comparable products. In comparison, the global warming potential that was calculated for a kilo of ammonium nitrate is almost 1.2 kg CO2 e or twenty times higher.
ICL is expanding its Polysulphate family of products, to include PotashpluS (with four nutrients – K, Mg, S and Ca) and PKpluS (with five nutrients – P, K, Mg, S and Ca) and Polysulphate Premium. These products give farmers a different choice of applying sulphur rather than nitrogen-based products, which run the risk of creating ammonia emissions, polluting groundwater and acidifying soils. The prolonged availability of the sulphate in Polysulphate products benefits the crop and is more aligned to its needs during growth. This makes them very efficient fertilizers and reduces loss through leaching.
Polysulphate Premium is derived from polyhalite, a naturally occurring mineral mined exclusively by ICL in the UK. Polysulphate Premium is shaped in beautiful uniform spheres. It is round in shape, smooth and robust, flows well, and spreads further, as well as more consistently.
To continue ICL’s outreach to farmers through the COVID-19 pandemic multiple virtual events were conducted as well as online webinars. There was also participation in virtual exhibitions and conferences.
Polysulphate is approved for organic use in multiple countries.
ICL has developed a knowledge hub which includes tools such calculators, apps and fact-sheets, so that its products can be used efficiently and effectively. See here our Polysul-fit Calculator and; our other tools.
By 2030, ensure sustainable food production systems and implement resilient agricultural practices that increase productivity and production, that help maintain ecosystems, that strengthen capacity for adaption to climate change, extreme weather, drought, flooding and other disasters and that progressively improve land and soil quality
Improve education, awareness-raising and human and institutional capacity on climate change mitigation, adaptation, impact reduction and early warning.
By 2030, combat desertification, restore degraded land and soil, including land affected by desertification, drought and floods, and strive to achieve a land degradation-neutral world.