Wissenschaftliche Publikationen "Messtechnik + Simulation"

Agriculture contributes the strongest to the nitrogen (N) enrichment of ecosystems. It is therefore important to know the spatial distribution of factors influencing N losses or to know the distribution of soil nitrate itself. One resource-extensive method to capture nitrate variability is the use of sensors. The present study examines the within-field variability of soil mineral N resulting from three sampling strategies and compares outputs of an ion-selective electrode (ISE) and a colorimeter to the results of the Nmin-method. With regard to sampling, the differences in the measured soil states are more pronounced when grouped by soil texture classes. The sensory measured nitrate concentration normally exceeds that of the Nmin-method. Furthermore, type and quality of the relation between sensory and conventional nitrate results depend on the preparation of soil samples and their organic carbon content.

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