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TF Yield Map and TF Yield Forecast
Currently still in the demo phase are the TF Yield Map and TF Yield Forecast. These products, which are specialized for winter wheat and maize, deliver absolute yield values in t/ha in a spatial resolution of 20x20m.
TF Yield Map
The TF Yield Map allows us to deliver small-scale information about the yield level at the harvest date retrospectively.
Using meteorological data, a crop growth model and the assimilation of canopy observations from satellite images of the respective harvest year, the TF Yield Map is deducted.
The TF Yield Map:
- Delivers comprehensive yield information for maize and wheat in values of t/ha
- Completes and substitutes existing yield maps, also in retrospective
- Allows a consistent and comprehensive overview of the harvested areas
- Allows yield mapping without having to harvest with specially equipped combine harvesters
- Allows comparison of harvest success of different varieties and management methods
Validation currently takes place via a comparison with the yield maps of a combine harvester.
In the following image you can see on the left side the TF Yield Map and on the right side the results of the yield mapping using a GPS combine harvester.
TF Yield Map |
Yield Mapping result |
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| Ex post modelled yield for winter wheat, 2010 |
Yield Mapping result , extreme values excluded |
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The spatial congruence of the TF Yield Map and the conventional yield mapping with the combine harvester is high.
The accuracy of the yield estimation in the first results hovers around 95%.
TF Yield Forecast
The TF Yield Forecast delivers a small-scale yield forecast two to four weeks before the desired harvest date.
Via assimilation of current weather forecasts as well as long-term weather observations into the crop growth model, grain yield can be derived even before the actual harvest date.
The TF Yield Forecast can serve as:
- Support for strategic contract negotiations
- Effective management of truck pools and efficient factory utilization in the green energy industry
The following image shows an exemplary TF Yield Forecast which was calculated using a satellite image six weeks before winter wheat harvest with a resulting accuracy of 88%.
| TF Yield Forecast |
Yield Mapping result |
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Yield in t/ha |
| Mean of modelled yield: 5.5 t/ha Forecasted using satellite imagery of June 19th. |
Mean of measured yield: 6 t/ha Harvest date: August 1st |
These two products are expected to be ready for a wider market in the harvest year 2013.
Until then, we test and validate the TF Biomass Map in close cooperation with selected demo farms.
If you are nevertheless already now interested in this product, please contact us for further information at info@talkingfields.de or call us at +49 89 28 77 95 24.
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