Issue 8 2016
Sharing the science: Polysulphate solubility tutorial
We know that, around the world, farmers and their advisors want to deepen their understanding of how crop inputs work. No longer the reserve of researchers, the application of science of crop nutrition is part and parcel of being a progressive farmer.

We want to feed that appetite for knowledge, especially when it comes to the Solubility of Polysulphate.
Ability to explain solubility
Of course we have the evidence. We have carried out research, in facilities in Israel and in France, that gives us the evidence - and in great detail. But with research findings you can give too much detail. The information - distilled and ready to apply - needs to be carefully prepared. In the previous edition of the Polysulphate Missive we mentioned the rising popularity of film. So film is the medium we have chosen to use to share our research findings - in segments.

Bitesize science
The topic of the solubility is a big one. That is why we divided the solubility experiments and results into five short films now ready to view on the Polysulphate Solubility micro-site, and on the Polysulphate YouTube channel. As well as the introduction to our research, there is the story of comparing the solubility of standard versus granular formulations, how soon the nutrients are released and the effect of rainfall on surface-applied Polysulphate.

Shortcut to knowledge
Some, of course, may prefer a shortcut. We’ve thought of that too. There’s a summary film about Polysulphate solubility - short and sweet - of the main findings of research or the main ‘take home’ messages from each of the experiments.

Mature solubility…not too quick, but just right!
Our solubility experiments demonstrated that Polysulphate is fully soluble, providing available sulphur, potassium, magnesium and calcium for plants. We show that Polysulphate is as soluble as other comparable fertilizers, with the advantage of being a four-nutrients fertilizer.

Polysulphate has a prolonged release pattern thus is less prone to leaching losses, preserving the environment and keeping the sulphur in the root zone for plant uptake. It is effective even under high leaching conditions, such as in tropical areas and sandy soils.

Broader and deeper
These days it is not enough to just tell people what Polysulphate does. We need to use every means available to show and share how Polysulphate works in the soil - and why it so effectively delivers the balance of nutrients so readily and steadily. In this way we are helping farmers with decision making about the inputs they choose to use.

We hope that you will enjoy the films and, of course, share them and the science of solubility.
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Mined in the UK, ICL is the first – and only producer – in the world to mine polyhalite, marketed as Polysulphate™