Calcifert Sulphur

One of the purest calcium sulphate fertiliser products on the market.

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We, therefore, recommend using this for arable and grassland soils deficient in calcium and sulphur.

Getting the right balance

Calcium and sulphur are essential nutrients for crops and grassland. Soil lacking in either of these minerals can result in:

  • Reduced yield
  • Poor crop performance
  • Reduced shelf life of fresh produce
  • Low Nitrogen Utilisation Efficiency
  • Reduced storage potential
  • Tight difficult to work soils
  • Reduced quality forage

We advise applying Calcifert Sulphur to soils where there is a known deficiency or to crops with a known high requirement.

Calcium deficiency

Calcium deficiency regularly occurs in acidic soils where natural Calcium has been leached. It is also evident in soils where high rates of slurry and fertiliser Nitrogen have been used. That is because these can have an acidifying action on the soils which lowers Calcium levels. Supplying crop available Calcium with Calcifert Sulphur benefits crop health and cell strength. It helps to reduce its susceptibility to cell degradation and disease.

Sulphur deficiency

Sulphur deficiency is common in crops where high rates of Nitrogen have not been balanced with adequate Sulphur. Due to atmosphere cleaning by reducing Sulphur emissions from industry and vehicles, there has been a 75% reduction in deposition to land. Therefore Sulphur deficiency has become very common affecting crop quality and nitrogen use efficiency. Supplying crop available Sulphate with Calcifert Sulphur helps rebalance the requirement during the growing season. As a result, this will improve yield and crop quality.

Magnesium excess

It is possible to move this excess Magnesium cation out of the soil by using higher rates of Calcifert Sulphur. We advise you to do this:

  • Where soils have very high Magnesium levels,
  • are hard to cultivate,
  • and tend to hold water with a sticky texture.

The Calcium helps to restructure the soil by improving the flocculation and reducing the dominance of Magnesium.

Efficient nitrogen generation

Sulphur is key to efficient nitrogen generation. It is therefore essential that farmers get the most from the input they apply, especially with ever-increasing fertiliser prices. Calcifert Sulphur is a quick and easy way to supply both calcium and sulphur to the soil and crop.

Calcifert Sulphur has been spreader tested on various machines. Our latest spreader calibration data is available from the spreader settings tab (scroll up and select next tab).

Calcifert sulphur

Product details

One of the purest calcium sulphate products on the market for arable and grassland soils is deficient in calcium and sulphur. Calcifert Sulphur is a granulated calcium sulphate product.


Trials of Calcifert Sulphur have resulted in:

  • Strengthening of the plant’s physical structure [link], helping to protect against disease and use sunlight and nutrients more efficiently
  • Improvements to spring barley yield where there was a sulphur deficiency
  • Increase in grass protein levels in three on consecutive silage cuts on grassland
  • Improved digestibility of grass forage
  • Improved soil structure and workability by reducing compaction caused by equipment and livestock

Product Analysis

Typical product analysis:

ElementTotal percentage in granulate
Calcium (Ca)39%
Sulphur (SO3)56%

Calcifert Sulphur has a neutralising value of zero, meaning it won’t affect the pH of your soil.

Packaging Calcifert Sulphur

Calcifert S is available in 600 kg bags and can be self-spread, making it ideal for targeting specific fields and perfect for precision farming.

You can apply our Calcifert products via a conventional fertiliser spreader. Independent tests have shown that Calcifert granulated products can be accurately spread up to 36-metre bout widths.

Spreader setting results

Trials with a range of leading fertiliser spreaders have shown that Calcifert Lime spreads to 36 metres and has a Co-efficient of Variance of less than 3.7%.  We have tested:

  • Amazone ZA-M
  • Kuhn Axis
  • KRM Ex trend
  • Vicon RSXL

Calcifert Sulphur has a similar spread pattern and has been separately tested with a range of fertiliser spreaders.

Trials with Calcifert Mag show that this product successfully spread up to 36-metre bout widths.

  • What rate of Calcifert Sulphur should I apply?


    This will depend on the crops Nitrogen requirement and is where you should use FACTS qualified advise. Some examples would be 175 kg/ha Winter Wheat and grass silage three cuts.

  • How many times should I apply Calcifert Sulphur during the season?


    You only need to apply this once in the spring, after that your soil only requires straight Nitrogen fertiliser.

  • Will Calcifert Sulphur help with high Magnesium levels in soils?


    Yes, it will move the excess Mg from the soil replacing it with Calcium and increasing flocculation, ultimately making the soil operate more aerobically.

  • Can Calcifert Sulphur help reduce Tip Burn, Internal Rust spot and Bitter Pit?


    The crop available Calcium will be taken up by the plant reducing these conditions because Calcium will better supply the cell structure.

  • How is the pH value of my soil affected by using Calcifert Sulphur?


    Calcifert Sulphur has a neutralising value of zero, meaning it won’t affect the pH of your soil.