Estimation of yield zones using aerial images and yield data from a few tracks of a combine harvester |
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| Authors: | Horst Domsch Michael Heisig Katrin Witzke |
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| Institution: | (1) Leibniz Institute for Agricultural Engineering Potsdam, Potsdam, Germany |
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| Abstract: | Yield maps derived from yield mapping systems are often erroneous not only due to limitations in measuring the yield precisely
but due to insufficient consideration of the requirements of yield mapping systems in practice as well. Aerial images of cultivated
crop fields at an advanced growth stage frequently provide a spatial pattern similar to that of yield maps. Therefore, the
possibility of generating a yield map using aerial images and measured yield data of a few tracks was examined for a period
of 2 years in two fields grown with cereals. Yield zones based on Visible Atmospherically Resistant Index (VARI) values were
compared with yield zones based on measured yield data of the whole field. About half of the grid cells of a field were allocated
to the same yield zones irrespective of the mode of yield determination. Using the Kruskal–Wallis test, the data sub-sets
of measured yield within the yield zones based on the VARI values differed significantly for all tested yield zones. As a
result, the approach was successful in the case of these experimental sites. |
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| Keywords: | Yield mapping Aerial images Yield estimation VARI |
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