N-xt Ferti-S Thiopaq®

zwavelgebrek in kool

Sulphur is an important element for a plant, because it contributes to optimum nitrogen use. Sufficient available sulphur during the season is crucial to optimum and healthy growth.

Adjustments essential

However, there is not enough sulphur available. For example at the start of the 1980s, there was still some 40 kg S available per hectare, but these days that has become less than 10 kg S per ha. For example, take hayfields that extract an average of 35 kg S and you realise that interventions are required. How effective could that be?

Ferti-S an organic sulphur

N-xt Fertilizers has developed a product that can be used most effectively by the plant. The raw material originates from large companies that work with patented bio-filter systems. Bacteria produce large amounts of sulphur as an excretion product. This is elementary sulphur (S) with a very small particle size. N-xt Fertilizers has been able to use its technology to create a formula with this element for a wonderful suspension that contains a large amount of easily available sulphur per kg (1250 gr SO3/kg product)

The benefits at a glance:

  • Originates from patented biological filter systems
  • Organic sulphur formed by bacteria (sulphur particles the size of stoma)
  • Extremely effective absorption (leaf and soil)
  • Easy to mix with the N-xt Leaf fertilisers and Soil fertilisers
  • Contains1250 gr SO3 per kg product
  • Ferti-S is hydrophilic and therefore attracts moisture compared to most sulphur products that dispel moisture
  • Creates effective nitrogen conversion into growth
  • Dose 1-2 litre/ha (various crops)


For more general information about sulphur click here.


Click here to download the product leaflet for N-xt Ferti-S Thiopaq®

N-xt Ferti-S Thiopaq® in the field

In 2012, we were only able to apply Ferti-S in the field later on in the season, but it generated extremely positive observations from users. For example, in cabbage cultivation they sprayed in various places in combination with N-xt Leaf fertiliser and the picture of poor growth and lack of sulphur was evidently restored.

There were also trials in hayfields around August/September, when rust starts to play a major role. Again we saw clearly improved growth (nitrogen use) with much less rust. The photos below are the proof; this was spraying with 2 litre/ha.