Polysulphate Takes off Across the Tip of the African Continent

Good farming is about overcoming agronomic issues. South Africa's sandy, highly weathered, low in organic matter soils benefit from Polysulphate.

August 18, 2021
2 mins

Recognizing the agronomic issues is key. The farmland covered by South African independent crop consulting company, Agropedo, has particular problems. Low organic matter, highly weathered and sandy soils are common features, according to senior agronomist David Hamman. “Crop nutrition is hampered by low cation (Ca, Mg and K) concentrations and the leachability of sulfate sulfur.”


Easy Solution for Common Problem

Knowing the science behind the agronomic problems faced in fields means that when David Hamman heard about Polysulphate he knew he had found the natural chemistry for the perfect response.

“At Agropedo, we specialize in using science and information for precision farming practices. I originally trialed Polysulphate as a sulfate source due to its characteristic of gradually being released, or available, to the plant over a prolonged period. This means there is lower leachability, as well as no soil acidification compared with other sulfate sources. Polysulphate also works well as a calcium source for crops with high calcium requirements and soils with low calcium level.”


Testimony on the strengths of Polysulphate, from straight-talking advisor, David Hamman.

Testimony on the strengths of Polysulphate, from straight-talking advisor, David Hamman.


Quick, Good Results in the Field

It may be a long distance from the source of Polysulphate, the ICL Boulby mine in the UK (the first and only to source natural multi-nutrient polyhalite) to South Africa. However, it took a very short time for the difference it makes to crops to be seen. “I am seeing healthier plants, better yields and increased shelf life”, describes Mr. Hamman. “This, of course, leads to better financial returns.”

By delivering 4 key nutrients (sulfur, potassium, calcium, and magnesium) in 1 application, the prolonged availability of these essential elements unlocks the genetic potential of the plant, and crop health, yield, and quality is enhanced.


Good Agronomic News Travels Fast

Such positive experience with Polysulphate is already encouraging other farmers to give it a try. Partnerships with fertilizer retailers in South Africa are part of our commitment to fulfilling farmers’ orders from across the region. Growers are hearing the news of this fertilizer’s availability – and potential – from numerous sources. But, as David Hamman concludes, it is seeing the benefits that is so convincing. “To other farmers and advisors, my message is to trial Polysulphate for themselves.”