On-the-Go Sensing for Site-Specific Nitrogen Top Dressing

null Heege; null Hermann J.; null Thiessen; null Eiko

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https://doi.org/10.1...arrow_drop_down

https://doi.org/10.13031/2013....

Article . 2002 . Peer-reviewed

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https://dx.doi.org/10.13031/20...

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On-the-Go Sensing for Site-Specific Nitrogen Top Dressing

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Jan 2002Publisher:American Society of Agricultural and Biological Engineers (ASABE)Journal:2002 Chicago, IL July 28-31, 2002

Authors: null Heege; null Hermann J.; null Thiessen; null Eiko;

doi: 10.13031/2013.9686

On-the-Go Sensing for Site-Specific Nitrogen Top Dressing

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Abstract

The control of nitrogen top dressing by optical sensing of crop reflectance or -fluorescence is dealt with. Reflectance sensing using the point of inflection in the red-infrared range is based on the chlorophyll-concentration in the leaves as well as on the leaf-area-index. Fluorescence sensing depends only on the chlorophyll-concentration in the leaves. Therefore reflectance signals are better suited for sensing the nitrogen supply. However, fluorescence signals should be explored for indicating the crop stress.

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