Nutrition Analysis of water

If you, as a grower, would like to monitor your drip or drain water, Groen Agro Control is the right company for you to perform the laboratory analyses on a regular basis. All analyses are performed in our ISO 17025 accredited laboratories and the results will be available the next day. The table below gives a clear overview of the nutrients that we measure as standard parameters. Our laboratory analysis of your drip and drain water gives a clear insight in the uptake and use of nutrients by your crops. Based on these results the process of fertilization can be adjusted.

A proper fertilization is of primary importance for an optimal cultivation. fertilization has a major influence on the quality and production of your crops. Groen Agro Control can assist in achieving an optimal fertillization of your crops at considerably low costs. In this way, your fertilization is always as it should be.

Our standard package of the analysis of micronutrients include the following elements:

Ammonium (NH4+)

Potassium (K+)

Sodium (NA+)

Calcium (CA2+)

Magnesium (Mg2+)

Silicon (Si)

Nitrate (NO3)

Chlorine (Cl- )

Sulphate (SO42- )

Phosphate (PO43- )

Iron (Fe)

Manganese (Mn)

Zinc (Zn)

Boron (B)

Copper (Cu)

Molybdenum (Mo)

pH and EC measurements are also included.

Additionally also urea in water can be examined.

Our standard package of the analysis of heavy metals include the following elements:

Aluminium (Al)

Cadmium (Cd)

Lead (Pb)

Chromium (Cr)

Arsenic (As)

Copper (Cu)

Mercury (Hg)

Nickel (Ni)

Zinc (Zn)




Would you like to get some more information about other inorganic analyses, please contact us.

Other Analyses

  • Uptake analysis 
  • Active Manganese
  • Total iron in source water (2 flasks necessary!)
  • Fluoride (in water, but also in plant or on surfaces)
  • Nitrogen (N) provision
  • Dry substance analyses on nutrition
  • Plant liquids analysis

Microbiological status of water

Our laboratory has the possibility for fast determination of plant pathogens in water. We have developed several methods of analysis for the determination of pathogens based on DNA identification. One of them is verifying DNA. These methods based on DNA -verification make sure that harmful pathogens can be detected in a fast and reliable manner.  

Besides determination of pathogens in water samples, we also perform the water analyses needed for food safety certificates such as Global GAP. E.coli is used by Global GAP as an indicator for the overall quality of the water. Groen Agro Control has extended its accreditation with the following services: 

  • Accredited sampling of water, which could be a requirement for some food safety certificates
  • Analysis of E. coli per 100 ml water by means of the MPN-method (Most Probable Number), in accordance with NEN-EN-ISO 9308-1. This method reports in MPN/100 ml and applies to water with a high background contamination.
  • Analysis of E. coli per 100 ml water by means of the Filtration-method, in accordance with NEN-EN-ISO 9308-1. This method reports in CFU/100 ml and applies for water with a low background contamination, such as tap water.