In our laboratory, tests can be performed in organic, mineral-organic, mineral fertilisers, soil improvers and substrates. We’re also authorized to test products, processes and services in organic agriculture.

The Act on fertilisers and soil improvers (Official Gazette of the Republic of Croatia “Narodne novine” nos. 163/03, 40/07, 14/14) and the related bylaws regulate the quality, quality control, labeling, marketing and inspection of marketed fertilisers, as well as the production and control of mineral fertilisers.

For mineral fertilisers that don’t carry the label „EC Fertiliser“, the Ordinance on mineral fertilisers (Official Gazette of the Republic of Croatia no. 61/07) and the Ordinance on the registration in the Register of fertilisers (Official Gazette of the Republic of Croatia no. 61/07) prescribe the conditions which must be met if they are going to be put on the market.

Mineral fertilisers that carry the label „EC Fertiliser“ are regulated by the Regulation (EC) no. 2003/2003 of the European Parliament and the Council of October 13th 2003 and the Act on the Implementation of the Regulation (EC) no. 2003/2003 on fertilisers (Official Gazette of the Republic of Croatia “Narodne novine” no. 81/13).

„EC Fertiliser“ is a fertiliser that is on the list of types of fertilisers listed in Annex I. of the Regulations (EC) no. 2003/2003 on fertilisers and complies with all the requirements prescribed by that Regulation. Also, the manufacturer of this fertiliser, in accordance with the definition of the Regulation, must have headquarters located in the European Union.

The list of analyzes of fertilisers that can be performed in our laboratory is as follows:

  1. Determination of ammonium (NH4+), amide, nitrate (NO3) and total nitrogen (N)
  2. Determination of nitrogen in urea and determination of biuret
  3. Determination of organic nitrogen
  4. Determination of phosphorus (P2O5) soluble in water, NAC, 2% citric acid, 2% formic acid, soluble in mineral acids (total phosphorus)
  5. Determination of water-soluble potassium (K20)
  6. Determination of secondary nutrients, total or water-soluble, magnesium (Mg; MgO), sulphur (S, SO3, SO4), calcium (Ca, Cao)
  7. Determination of micro-nutrients, total or water-soluble, boron (B), cobalt (Co), copper (Cu), iron (Fe), molybdenum (Mo), zinc (Zn)
  8. Determination of moisture, dry matter, organic matter and ash


Soil is the surface of the Earth’s crust on and in which plants grow. They are rooted in it and they draw nutrients with their roots from it, which are necessary for their growth and fruiting. With their permanent use in agriculture, an effect of exhaustion is achieved, i.e. it comes to a reduction in macro- and micro-nutrients that the plant consumes. Exhausted soil is not suitable for a commercially profitable agricultural production, which is the reason why we must pay special attention to the control of soil fertility.

The control of soil fertility is possible only via a chemical analysis as one of the basic principles of the Good Agricultural Practice (GAP). Through a chemical analysis of the soil we detect concentrations of certain nutrients and other parameters necessary for a safe and regular growth and yield of plants.

The most important parameters that are determined through a chemical analysis of the soil are as follows:

–        pH value of the soil

–        electrical conductivity (EC)

–        hydrolytic acidity (Hk)

–        share of humus

–        share of active lime (CaO)

–        share of total carbonates (CaCO3)

–        concentration of macro-elements (nitrogen, phosphorus, potassium)

–        concentration of micro-elements (iron, zinc, calcium,manganese, magnesium, boron and others)

The chemical analysis of soil is followed by a classification of the soil, as well as the creation of a plan and budget of fertilisation with respect to the agricultural culture planned to plant /seed or that is already growing on a given piece of soil.

The aim of the plan of fertilisation is a timely and quantitatively optimal application of fertilisers, thus creating conditions for a proper growth of plants and a commercially profitable yield. In doing so, the negative impact of fertilisers on groundwaters is minimal, and the material profit for the farmers is maximal.


Irrigation is a hydro-engineering measure to improve the physical properties of the soil by adding water by the addition of water, to achieve the most favorable humidity level during the growing season and thus achieve an optimum yield.

In our laboratory, at the request of the customer, we perform a chemical-microbiological analysis of irrigation water according to the parameters listed in the Technological instructions for integrated production, which is being issued annually by the Ministry of Agriculture of the Republic of Croatia.

Parameter of irrigation water                        Limit value

 Temperature                                                         35 °C

 Content of suspended substances                  100 mg/l

Content of dissolved substances                      2000 mg/l

Electrical conductivity                                         2000 (mS/cm)

Nitrates                                                                 10 mg/l

– for values that are larger than the limit value,        
their content should be taken into account in the balance sheet 
of fertilisation

Sodium (Na)                                                         70 mg/l

Chlorine (Cl)                                                        100 mg/l


microbiological property of irrigation 
a) irrigation of plants, parts of which                  1.000 total coliform bacteria MPN/l
are being enjoyed raw or boiled (except for 
drip irrigation)

  1. b) irrigation of plants for the processing                 200.000 total coliform bacteria MPN/l