The field trial on coffee crops, which took place over 30 months, showed that ThermoPotash, or TK, was more efficient in delivering potassium than another form of potash fertiliser - potassium chloride (KCl).
The product generated equivalent coffee yield while using 36% of the potash that was applied to the KCl test plots in Brazil, Verde said. ThermoPotash can also be applied in a single dose rather than multiple applications of KCI, which is positive in terms of costs.
ThermoPotash does not contain chloride, which research has shown is responsible for a reduction in quality of coffee beverages.
The tests in Brazil were carried out by the company in conjunction with EPAMIG, the agricultural research service of the government of Minas Gerais State.
Last month, Verde unveiled a new strategy to develop the Cerrado Verde project.
It will involve two phases, and the first phase will see the company build a rotary kiln flex plant with a capacity of around 1,000 tonnes per day (tpd) for the production of ThermoPotash.
The flex plant will also be operated to process potassium chloride (KCl) in order to further develop scale-up and commercialisation of the process and with the intent of securing performance guarantees on a 12,000 tpd kiln for KCl production.
Brazil is the world's largest coffee producer with more than half of the country's coffee grown in Minas Gerais State. Brazilian coffee growers spend around US$250 million annually on potash fertilisers.
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