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SIDDRA: diagnosis and tips for the nutrition of your crops

This system provides access to a series of personalised guidelines drawn up by professional experts in the sector.


Integral Diagnostic and Fertiliser Recommendations System

With this software, which integrates all the parameters involved in the soil-water-plant complex for interpretation in our Agronomic Laboratory, you will be able to get the most out of your crops.


Highly accurate and reliable fertilisation recommendations made by our technical department, after interpretation of the results obtained in previous soil, water and plant analyses.

Advantage 1

Receive optimal and highly precise recommendations.

Advantage 2

Personalised attention from our technical department.

Advantage 3

Exclusive, value-added service for Fertiberia customers or distributors.

Advantage 4

Complete analysis of the soil, water and plant complex.


Everything you need to know about this service

What is Siddra?

The Siddra system is a software created by Fertiberia for the diagnosis, interpretation and recommendation of the analyses managed from its Agronomic Laboratory.

At Fertiberia, aware of our responsibility as a leading company in the plant nutrition sector, we encourage a rational and appropriate use of our products. This is why the Siddra system was created, to further optimise the interpretations, the diagnosis and the fertiliser recommendations that have complemented your agricultural analyses for more than 2 decades.

When did Siddra begin?

Siddra began to be considered around 2005, starting shortly afterwards with the signing of a macro-agreement for a University-Business partnership between Fertiberia and various universities.

Who developed Siddra?

The Siddra system is the result of a partnership between Fertiberia and various universities in Spain. Such universities include: Polytechnic University of Valencia (UPV), Miguel Hernández University of Elche (UMH) and the University of Alicante (UA). Numerous researchers from these universities have participated in the development of the Siddra system while working closely with staff from Fertiberia's Agronomic Service and R&D&I Department.

What new advantages does Siddra offer?

In 21st century agriculture, there is an increasing need for agricultural analyses, including plant, soil and water analyses. With the results of these analyses, we will be able to know, among other things, the fertility of our soils and the nutrient balance of our plants. At Fertiberia, as an innovation we provide the most modern tables for soil interpretation and also develop and improve several foliar interpretation systems.

What foliar interpretation systems does Siddra develop and improve?

There are many methodologies for the interpretation of foliar analyses. Five of these interpretation methodologies have been selected, developed and improved in the Siddra system. For traditional interpretations, we the Ranges of Normality. For more refined interpretations, we have the Standard Deviation Index (IDS). And for much more complex interpretations, even outside the traditional sampling period, we have the Integral Diagnostic and Recommendation System (Dris), the Modified Dris (M-Dris) and the Nutrient Diagnosis and Composition (CND) system.

How have these foliar interpretation systems been developed and improved?

Traditionally, one of the weaknesses of all these foliar interpretation systems was the limited number of existing standards to be able to use them, given that the availability of numerous analytical results of the different crops to be able to study them is one of the basic tenets in developing new interpretation standards. The larger the study database, the better the results that will be obtained.

How many analyses are there in Fertiberia's database?

At Fertiberia, we have a database with over 50,000 agricultural analytical results from more than 2 decades of work at the service of the farmer. In addition, more than 10,000 targeted analyses have been carried out on various crops for the Siddra project. The result of all these studies has been the generation of 5,000 new foliar interpretation tables for woody crops and 3,000 new foliar interpretation tables for herbaceous crops.

How can I access the progress made by Siddra?

To access the diagnosis and optimised recommendations of the Siddra system, you must be a customer or distributor of Fertiberia fertilisers.

The Siddra system is a value-added service offered by Fertiberia free of charge, so it costs the farmers nothing and optimises their investment in plant nutrition products, knowing the environment will be respected as much as possible.

Would you like to request an analysis?

Contact our network of specialised sales representatives.

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