Agri Con GmbH

Nitrogen Fertilisation Tester



The amount of nitrogen that is necessary for an optimal grain harvest changes from year to year and also alters according to field and grain variety. Measurements with the YARA N-tester give the farmer precise information about the current nutrient uptake condition of the plants. It is thus possible to derive the optimal amount of the individual doses at any time. Even small differences in the nitrogen uptake - for instance through different nitrogen fertilisation or soil delivery - can be recorded by the YARA N-tester.

Fast, reliable, simple to use
The YARA N-tester works according to an optimal measurement principle: the farmer determines the chlorophyll content, or green colouring, on at least 30 leaves. For this the youngest, most fully developed leaves are chosen. Since each variety and crop has its own characteristics the measurement value is offset with a correction factor. The farmer then enters the corrected value into the fertilisation recommendation table of YARA for the nitrogen recommendation for the tested area. These maps for variety correction and fertiliser recommendation are updated every year before the start of the fertilising season.

The YARA N-tester is a reliable instrument for determination of the nitrogen optimum. It is easy to manage and enables a fast, uncomplicated and trouble free analysis. The farmer can use this in combination with the YARA N-Sensor to implement the calculated nitrogen recommendation on the field.

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