In this article:
Yield data allows you to make more informed decisions and improve growing efficiency.
Field management zones constructed from multiple years of yield data are suitable for an initial assessment of potential yield and soil nutrient variability to make future crop management decisions.
Analysis of yield data can be converted to a variable rate application map and used, for example, for fertilizer application.
Yield data calibration is another topic you need to consider, we will cover it in a separate blog post.
The advanced analytics in GeoPard is that you can perform multi-layer analysis by combining multiple layers of data into one map and look for relationships between the data layers.
Combined productivity zones can be generated based on vegetation indices from satellite imagery, topography, data from machinery such as yield, electrical conductivity, soil moisture, and others, as well as agrochemical analysis results.
Visualization of yield files is done automatically after downloading the file, its automatic processing and cleaning. Two versions of maps are shown below – the original image with data from the equipment monitor as is, and the GeoPard visualization. The raw data has been converted into a gradient continuous surface image, for easier understanding of the the field heterogeneity and creating management zones.
Each of the attributes of the yield file is available for visualization, such as moisture, yield mass, yield volume wet and dry, downforce, fuel consumption, machine speed, and so on.
Raw data correction means that if a point in the field is unnatural, it will be smoothed (for example, working over not the full width of the combine header). When creating Zones based yield data, you can correct individual zones and polygons.
Let’s take a look at some practical examples of using yield maps and other GeoPard data layers.
1. Management zones based on yield data. Management zones can be constructed based on either one year’s yield data or multiple years. It is important to note that you cannot directly stack yields from different years, as you will get a bias in favor of one of the years. To reduce this effect, GeoPard applies several algorithms to make the weight of each year even. You can set the importance of a single year through the Weight tool when you create a Multi-layer map. Such field management zones can be used to build application/prescription/Rx (VRA) maps, calculating the potential yield in each zone.
2. Multi-layer zones with yield data and other data sources (topography, soil, sensor, satellite). Yield data can be added to multilayer analytics and set the weight it will have on the final zones. In this example, three layers of data are added to the map: Yield, Satellite imagery, and Topography. You can combine any data layers you consider relevant for analytics. The multi-layer map can be used for further analytics and creating VRA maps.
3. Yield calculation on zone and field level. To analyze different treatments, seed varieties and agronomic practices you probably want to compare average and total yield in each zone, strip or between fields. GeoPard automatically calculates this for you to make it easier to compare yield in absolute numbers.
4. Dependency zones basedon yield data. Zones based on yield data can be overlaid on other data zones and you can search for dependencies between data layers. This example shows the overlay of high yield and average protein (1) and low yield and high protein (2) of different wheat varieties in a field.
Other examples include the relationship between the influence of topography on yield, the intersection between low yields and the lack of macro- and micronutrients in the soil, soil moisture and electrical conductivity (EC) layers.
5. Variable Rate application (VRA) maps based on yield data. You can create prescription maps for different operations – fertilizing, seeding, spraying, irrigation and planning of soil sampling. You can edit the number and shape of the zones.
You can also build a prescription map for a variable rate application by combining yield data with other data sources (soil, EC, satellite, topography).
Even if you do not have yield data, you can use GeoPard multi-year zones (up to 33 years) based on satellite imagery or combine it with other data layers like topography to start your precision agriculture journey. These analyses often correlate with yield data, but this is another story.Blog
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