Amsul - a perfect combination

Amsul is the most cost-effective, crop responsive and environmentally friendly nitrogen and sulphur fertiliser available to today’s farmers. It improves the protein quality and boosts the yield of wheat, spring barley, grass and silage and it improves the health and vigour of crops and has a higher yield per unit of nitrogen compared with ammonium nitrate fertilisers. Unlike Urea, Amsul can be applied as soon as conditions are suitable to travel on land so allows your crops to gain maximum benefit from that early nitrogen boost and get away to a good early start.

  • Contains 8% Nitrogen in the ammoniacal form.
  • Spread by experienced contractors there is little risk of striping and saves you time.
  • Not as dependent (like urea) on soil temperature so will not readily leach or volatilise.
  • Contains 9% Sulphur (23% SO3).
  • Perfect for oilseed rape and other sulphur-demanding crops.
  • Supplies Nitrogen and Sulphur in just one pass.
  • Can be applied earlier and is ideal for Spring conditions.
  • A very competitive source of combined Nitrogen and Sulphur.
  • Non hazardous.
  • 90% of customers repeat purchase so it works well!
  • Contains 21% Nitrogen in the ammoniacal form.
  • Not as dependent (like Urea) on soil temperature so will not leach or volatilise.
  • Contains 24% Sulphur (60% SO3).
  • Perfect for oilseed rape and other sulphur-demanding crops.
  • Ideal for dissolving sulphur to Nitrogen (urea) mixes.
  • Supplies Nitrogen and Sulphur in just one pass.
  • Crystal form is significantly more competitive than granular alternatives.
  • Boosts the quality and yield of grass and silage.
  • Improves health and vigour of crops.
  • Non hazardous and easy to store.

Sulphur is an essential nutrient for all crops – the uptake of Sulphur in crops is about the same as that in Phosphate. Although the soil can supply some Sulphur – typically 7-12 units a year – the main source of Sulphur for crops has been atmospheric pollution. Recent improvements in pollution control and changes in the type of fuel that is used have greatly reduced this source of Sulphur. Yield responses to applied Sulphur are now widespread and large, and can be found almost everywhere in the UK outside the industrial Midlands.

In a series of 23 field trials on a grass cut for silage, Adas found an average increase of 9%, nearly half a ton of dry matter per acre. Individual trials showed yield benefits of up to 47%. Other organisations have found similar results on yield responses are now being reported in oilseed rape and cereals in the main arable areas. Sulphur is taken up by the roots of the crop. Sprays therefore are only effective as Sulphur sources once the Sulphur has been washed off the leaves into the soil. The Sulphur in Amsul is applied directly to the soil and is immediately soluble and available to the crop. Amsul is simply the best fertiliser for applying Sulphur to crops.

The nitrogen in Amsul is all in the ammonium form. Once applied to the soil this ammonium – N will be used by the crop or converted to nitrate – N which is also taken up. Under most circumstances, the effectiveness of Amsul as a nitrogen source is the same as that on ammonium nitrate.

Application Recommendations
In areas where sulphur deficiencies occur or are expected – and these now include a large part of the UK – Amsul is the best source of fertiliser Sulphur. At 60 units per acre, Amsul will provide adequate Sulphur for all crops, together with part of the nitrogen requirement. Amsul should be applied in Spring to arable crops, for example, as the early dressing on cereals or oilseed rape. On grassland, Amsul can be applied in Spring for first cut or mid-season for grazing.

Amsul has long been used as a nitrogen fertiliser, is suitable as a top dressing for grassland and all arable crops and can be substituted for ammonium nitrate on a unit of N. basis. Because Amsul contains 21%N, 1.5 bags of Amsul can replace 1 bag of ammonium nitrate. This simple rule covers the use of Amsul in almost all circumstances. As with any fertiliser nutrient, care should be taken not to over supply sulphur. Excess Sulphur on oilseed rape has been shown to slightly increase glucosinolate levels – and on grassland where there is a risk of copper deficiency this can be exaggerated by excess sulphur.

Amsul can be more effective than ammonium nitrate when the soil is cool and wet as in early Spring. Under these conditions, nitrate-N can be lost by leaching or conversion to nitrogen gas. The same conditions prevent or slow down the conversion of ammonium-N in Amsul (which is not lost but can be taken up by crops) to nitrate-N. In these circumstances therefore, Amsul is a preferable nitrogen source. This is shown by trials carried out on grassland by the Agricultural Research Council (the Grassland Research Institute annual report 1982 pages 26-28). Losses of nitrogen where Amsul was used was between 1/5th and 1/20th of those found with ammonium nitrate. As a result, yields were more than 25% higher where Amsul was used./

For Amsul 8% in liquid form, we recommend application by one of our experienced and friendly spreading
contractors. Amsul is supplied in 21% crystal form and can be spread using normal fertiliser distributors.
Pneumatic machines spread Amsul and give full bout widths.Where disk or oscillating spout machines
are used, bout widths should be reduced to half as 2/3rd of those found with granular fertilisers.
As with any concentrated nitrogen fertiliser, spreaders should be calibrated before use.

Material Safety Datasheet - Amsul 8

Material Safety Datasheet - Amsul 21

NaCTSO Fertiliser Security Five Point Plan



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