How to perform the reduction of bicarbonates

In order to optimize and improve fertirrigation interventions and preserve the facilities, it is necessary to neutralize the content of bicarbonates (of calcium and/or magnesium) present in irrigation waters, considering the worsening quality of water itself.

The acidification of the water used in fertirrigation increases the solubility and the availability of nutrients and is a fundamental step to avoid problems regarding the formation of precipitates and the occlusion of drainers and filters.

Through acidification, we are able to neutralize the bicarbonates in excess and to lower the pH. Still, it is always important to maintain a certain quantity of bicarbonates in the water (0,5-1 mMoli/liter), which carry out a buffering function in the nutritional solution prepared for fertirrigation.


There are several acids that can be used for this purpose: nitric acid, phosphoric acid, or new-generation water-soluble fertilizers with acid reaction, such as the Greenplant VIP and Calfon lines, in order to obtain irrigation waters with an optimal pH between 5,5 and 6.

The Greenplant VIP line includes the following formulations:

  • Greenplant VIP 13-8-24+3+micro
  • Greenplant VIP 10-40-10+2+micro
  • Greenplant VIP 8-5-40+2+micro


It is able, for every g/l used, to reduce by 40mg/l the bicarbonates present in irrigation waters.


The fertilizers from the Calfon line, for every g/l used, are able to reduce the bicarbonates by respectively:

  • CALFON 14-11-22+8 CaO+micro (bicarbonates reduction by 80 mg/l)
  • CALFON P 8-34-16+8CaO+micro (bicarbonates reduction by 50 mg/l)
  • CALFON K 12-8-28+8CaO+micro (bicarbonates reduction by 40 mg/l)

The use of the Greenplant VIP and Calfon lines contributes to the solution of problems such as the occlusion of the irrigation network and of the drainers, and increases the efficiency and efficacy of the performed fertirrigations.