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AMOFOSKA NPK 4-16-18 is a typical pre-sowing fertilizer. After sowing on the ploughed land it needs to be mixed with soil. The fertilizer can be used for all crops but it is primarily intended for fertilizing all winter cereals and oilseed rape. In spring AMOFOSKA is particularly useful for fertilizing potatoes and sugar beet due to the correct aspect ratio of phosphorus to potassium for root crops. Nitrogen should be supplemented in the form of appropriate nitrogen fertilizers according to the requirements of a fertilized plant.

is also a good fertilizer for legumes that need the nitrogen start dose contained in this fertilizer, as well as for small-seeded legumes grown in mixtures with grasses.


AMOFOSKA NPK 4-16-18 is granular compound fertilizer of the following nutrient content:


  • 4% N ammonium nitrogen (total),
  • 16% P2O5 phosphorus pentoxide soluble in mineral acids, at least: 5% P2O5 phosphorus pentoxide soluble in neutral ammonium citrate and water, at least 2.5% P2O5 water-soluble phosphorus pentoxide,
  • 18% K2O water-soluble potassium oxide,
  • 5% CaO water-soluble calcium oxide,
  • 10% SO3 sulphur trioxide in the form of water-soluble sulphates.

Micronutrients (B, Co, Cu, Fe, Mn, Mo, Zn) derived from natural phosphate rock are a valuable addition fertilizer for improving the bioavailability of other ingredients. Under normal conditions this fertilizer does not contain harmful levels of heavy metals such as arsenic, cadmium, lead or mercury, so it is safe for the environment. The high quality of granules i.e. the uniform size of grains, homogeneous composition of each granule and the lack of dust facilitates uniform sowing. Sulphur in an easily-assimilable form is a valuable nutrient for sulphur-loving plants; especially recommended for use on soils with low sulphur content.


AMOFOSKA NPK 4-16-18 is intended for the pre-sowing application of cereals and oilseed rape, primarily grown in soils with average phosphorus content. Due to the presence of potassium, this fertilizer can also be recommended for spring application for root crops and hard-seeded legumes.


The main component of this fertilizer is potassium, so doses should be determined according to the needs of fertilized plants regarding potassium and the content of assimilable potassium in the soil. The phosphorus-potassium ratio provides sufficient phosphorus fertilization of all plants, provided the correct dose of potassium is applied. In most cases it will be necessary to provide supplementary nitrogen fertilization.

Fertilized plants Dose *
Winter crops 300 - 500
Spring crops 250 - 400
Winter rape 500 - 700
Sugar beet 700 - 900
Potatoes 600 - 800
Legumes (horse beans, peas, lupins) 400 - 600
Clover and alfalfa with grasses (green forage) 500 - 700

* The doses given in the table are indicative and should be adjusted depending on the expected yield.

The doses given are indicative and should be adjusted depending on the expected yield. This fertilizer can be applied in early spring on the grassland at a dose of less than 400 kg of fertilizer per hectare. In early spring, and before the next swath or grazing of pastures, an additional 60 kg N/ha should be applied.