NPK 4-16-18


NPK 4-16-18

amofoska® NPK 4-16-18 It is a typical pre-sowing fertilizer. After sowing for the role, it is necessary to mix it with the soil. This fertilizer can be used for all crops, but first it is intended for fertilization of all winter cereals and rape. In the spring amofoska® NPK 4-16-18 is particularly useful for fertilizing potatoes and sugar beets, due to the right proportion of phosphorus to potassium for root crops. Nitrogen should be topped up in the form of appropriate nitrogen fertilizers according to the requirements of the fertilized plant.

amofoska® NPK 4-16-18 is also a good fertilizer for legumes, which need a starting nitrogen dose (just in the amount contained in this fertilizer) and small-seed legumes grown in mixtures with grasses.


amofoska® NPK 4-16-18 is a granular multi-ingredient fertilizer with the following nutrient content:


  • 4% N ammonium nitrogen (total),
  • 16% P2ABOUT5 phosphorus pentasols soluble in mineral acids (total); at least 5% P2ABOUT5phosphorus pentoxide soluble in neutral ammonium citrate and water, 11% P2ABOUT5 phosphorus pentoxide soluble only in mineral acids, at least 2.5% P2 ABOUT5 phosphorus pentoxide soluble in water
  • 18% K2For potassium oxide soluble in water,
  • 4% CaO calcium oxide soluble in water,
  • 10% SO3 sulfur trioxide soluble in water.

Microelements (B, Co, Cu, Fe, Mn, Mo, Zn) Micronutrients (B, Co, Cu, Fe, Mn, Mo, Zn) derived from natural phosphates are a valuable addition to the fertilizer improving the assimilation of other components. According to the current criteria, this fertilizer does not contain harmful amounts of heavy metals such as arsenic, cadmium, lead and mercury, so it is safe for the environment. High quality of granules, i.e. uniform grain size, uniform composition of each granule facilitates uniform sowing. Sulfur in easily digestible form is a valuable nutrient for sulfur-bearing plants, especially recommended for use on soils with low sulfur content.

amofoska® NPK 4-16-18 is intended for pre-sowing use for cereals and oilseed rape, first grown on soils with an average phosphorus content. Due to the potassium content, this fertilizer can also be recommended for spring use for root crops and leguminous plants.

The main component of this fertilizer is potassium, so the doses should be determined according to the demand of fertilized plants for potassium and according to the potassium content available in the soil. Proportion of phosphorus-potassium in ammophos® NPK 4-16-18 provides sufficient phosphorus fertilization for all plants. In most cases, however, supplemental nitrogen fertilization, preferably urea or ammonium nitrate of Puławy will be necessary.

Fertilized plantsDose *
Winter cereals300 – 500
Spring cereals250 – 400
Winter rape500 – 700
Sugar beets700 – 900
potatoes600 – 800
Legumes (beans, peas, lupines)400 – 600
Clover and alfalfa with grasses (green)500 – 700

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

The doses given are approximate and should be modified according to the size of the expected yield. This fertilizer can be used in early spring for grassland in a dose not exceeding 400 kg of fertilizer per ha. In early spring and before the next swath or grazing pasture, 60 kg N / ha should be additionally applied.