Site specific Nitrogen fertilisation is one of the main objectives in precision agriculture. The Nitrogen sensor consists of a dual channel AvaSpec spectrometer, fibre optics and processing electronics mounted in a blue cap on top of a tractor.

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Monitoring fertilizer concentration on the go
To measure and apply the appropriate levels of fertilisation on crops can be a time consuming activity - this is what the Yara system was designed to facilitate. Featuring a dual channel AvaSpec series spectrometer, fibre optics and processing electronics mounted in a blue box on top of a tractor, the system makes realtime measurements of the optical appearance of crops and intelligently applies fertilisers accordingly.

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Important information for the correct fertilisation is the level of nitrogen in a crop, which is measured by means of reflection spectroscopy. In the visible range (380-740nm) the reflection is an indication of the leaf chlorophyll content, in the NIR range (700-1000nm) reflectance is mainly affected by the crop’s biomass. Included with the Yara system is a terminal for realtime monitoring. A special viewing geometry and integrated irradiance correction guarantees accurate measurements. The system logs crop and GPS data on an on-board data card.