G27 is a natural fertilizer derived from GAFSA natural phosphates.
Product Description
  • G27 is a natural fertilizer derived from GAFSA natural phosphates known for their reactivity and solubility in the weak acids present in the soil.
  • For these reasons, G27 is highly recommended for direct application.
  • G27 is obtained by very thorough fine grinding of GAFSA natural phosphate to a fineness of 90% less than 63 microns.
  • The finely ground product is granulated with an inert nitrogen additive to enrich G27 with sulphate and ammoniacal nitrogen, which gives it additional agronomic value.
  • Composed essentially of GAFSA natural phosphate, renowned for its tenderness and porosity, G27 has a specific surface area greater than 22m²/g, which ensures better contact between the roots and the fertilizing element, hence better phosphorus solubility and consequently a better assimilation of the element P by the plants.
  • Indeed, the solubility of G27 in 2% formic acid is 70-75% and in 2% citric acid is 40-45%, which gives a P2O5 soluble in formic acid and citric acid respectively of 19-21% and 11-13%.
  • In addition to its use as a direct application phosphate fertilizer, G27 is widely used in the formulation of several bulk-blending PK and NPK products.
P205 27% C 0.6%
N 1-1,5% MgO 0,5-1%
CaO 45% H2O Max 3%
CO2 6.3% Micro-elements
O2 7-8% B 12-J4 ppm
Na2O 1.4% Cu 18 - 20ppm
Al2O3 0.4% Mn 25 - 30ppm
F02O3 0.6% Zn 200 - 300ppm

90% between 1 et 4,5 mm

Method Solubility in % % of P2O5 in the product
2% Acide citrique 40-45 11 - 13
2% Acide formique 70-75 19-21

Physical Benefits of the G27

In addition to its effectiveness as a long-lasting phosphate fertilizer, G27 has several physical qualities, namely :

  • Powder-free granular form.
  • Automated spreading possible.
  • No segregation or chemical reaction when mixed with other fertilizers (urea, ammonium nitrate, DAP, etc.).
Agronomic Benefits of the G27
  • G27 contains phosphorus in a controlled and long lasting slow release form. Also the presence of a quantity of water-soluble phosphorus gives an immediate effect of phosphorus fertilization. The rest of the phosphorus is released gradually.
  • Indeed, an estimated 20% of the phosphorus contained in G27 is absorbed by plants during the first growing season, the rest will feed the soil for a period of 2 to 3 years through a very slow release process.
  • Due to its high Cao content, G27 is an effective source of calcium, not only on the nutritional level of the plant but also allows the liming of acid soils and therefore the correction of soil acidity. This results in increased crop yields.
  • The presence in G27 of a high content of assimilable sulfur gives it additional agronomic value given the important role that the element sulfur plays in plant growth.

Numerous studies carried out in various research institutes and in different countries around the world have shown that G.27 is ranked among the best highly effective phosphate fertilizers for direct applications on acidic soils.

Large field trials in SCOTLAND have shown G.27 to be highly effective for pasture..

It has also been shown that G.27 is also effective in direct application for several other crops such as :

  • Cereals (Rice. Corn. Wheat).
  • Pulses (beans, lentils, peas).
  • Vegetable oils (soya, peanuts, palm).
  • Fruit trees.
  • Rubber.
  • Pastures and fodder.
  • foresterie.

G27 is recommended for direct application in acidic or slightly acidic soils with a pH lower than 6.5.

G27 is most effective when applied before the first rains of the season, a few weeks before the application period for water-soluble phosphate fertilizers.

Cultures Application rate*
Cereals 300-500 Kg/ha
Corn 400-750 Kg/ha
Fruit trees 400-500 Kg/ha
*The doses mentioned are indicative. They may vary with climate, rainfall and soil phosphorus reserves.