Willmar and Little Falls branches of Anez Consulting offer various precision ag services. We will gladly develop management zones (3-7 per field) based on the layers below or grid sample and provide detailed maps of the nutrient variability inherent to your fields. Generally, the greatest return-on-investment is with lime and variable-rate seeding applications, but these maps may be used for other variable-rate applications as well.
Once your dealer has set up your equipment for variable rate seeding, we will walk you through the process of getting our prescriptions into your controller to keep your planting as precise and efficient as possible.
- Mapping Products
- Yield maps
- As-applied maps
- Topography and elevation
- Tile lines, field boundaries, and map/measure other features
- Relative biomass
- NDVI red, green, and RGB VI
- Digital Surface and Terrain Maps
- Management zone generation and soil sampling
- Grid-based soil sampling and nutrient mapping
- Variable-rate Rx generation and compatability assurance
- Fertilizer application
Examples of Layers Used for Management Zone Creation
We will often incorporate topography into our management zone generation process. This allows us to identify hilltops, depressions, and other features that may call for different management decisions.
In this example, we can seperate the high ground (orange-yellow) from the low ground (green-blue). The low ground on this field is subject to extended periods of saturation even-though the soil texture varies from high organic matter sandy loam (somewhat well-drained) to gravel (very well-drained).
We can export your yield data, clean it up, and utilize it as an added layer in our management zone delineation. We can also export as-applied maps from controllers to assist you in your farm record-keeping endeavors.
Yield maps are a great way to show how well certain areas performed. However, they don’t tell you why an area performed a certain way. For example, areas that are moisture limiting (like gravel hilltops) often show similar on a yield map to areas that are excessively wet (like drown-outs).
For this reason, we generally do not rely heavily on yield maps when creating management zones, but they are a great way to document the harvest.
NDVI Red, NDVI Green, & RGB VI
These statistical analyses of light reflectance from the plant surface are used to infer the relative health and population density of the crop.
In this example, we are able to clearly identify water-stressed crops outside of irrigation, nitrogen-limited areas due to cool or saturated soils, and areas of healthy crop outside of irrigation where the organic matter and topography naturally allow for a greater supply of water to the crop.
Veris and EC Maps
Anez Consulting, Inc of Willmar has a Veris cart that they have used to successfully delineate management zones based on soil texture. While you can use soil survey maps for a similar end, Veris/EC maps provide a much greater level of detail and accuracy.
If you have already had your fields mapped with Veris or another EC system, we can still use that layer to fine-tune your management zones.
Using other data-sets, we can infer the relative biomass of a crop based off of the height of the crop as it varies throughout the field. Generally speaking, greater biomass will be present where the crop is taller than where it is shorter (but not always).
The vertical striping on this example is the result of a height difference between two different hybrids of corn. The red-yellow feature near the south end of the field is a drown-out where population was low and the few remaining corn plants were short relative to the surrounding area. The purple area that lies adjacent to this red-yellow feature is where soils were well-drained enough to prevent drown-out so population remained high and the higher population coupled with lower stress resulted in plants that were much taller than other areas.
There may be some value to this layer in variable-rate irrigation (increased biomass = greater leaf-area index) and in-season fertilizer placement but we are still researching these applications at this time.