Nitrogen Zoning

The Nitrogen Zoning Service supports precision nitrogen management by dividing crop fields into 1, 3, or 5 zones based on the spatial variability of nitrogen status observed by satellite-derived nitrogen indices. Fields with the lowest variability are assigned to a uniform zone, while fields with moderate or high variability are divided into 3 or 5 different zones, respectively. These zones reflect differences in crop nitrogen status within the field. For potato crops, the zoning process is using results from our Leaf Nitrogen Service.

By identifying and responding to in-field nitrogen variability, this service allows for site-specific fertilization based on the actual needs of each zone. Applying the right amount of nitrogen fertilizer to the right zone can help optimize crop growth, improve nitrogen fertilizer use efficiency, and reduce input costs and environmental risks such as nitrate leaching. The zoning model is continuously refined with additional field nitrogen application data, further improving its accuracy and long-term value. This approach enables farmers to move from uniform treatments to precision nutrient management, supporting higher productivity and more sustainable agricultural practices.

Usage

The processNitrogenZoning() mutation and retrieveNitrogenZoning() query are used to generate and retrieve nitrogen zoning analyses. They each require four arguments:

• polygonId
• startDate
• endDate
• analysisType

mutation {
  processBioMass(
    polygonId:    "[YOUR POLYGON ID GOES HERE]"
    startDate:    "2023-01-01"
    endDate:      "2023-07-31"
    analysisType: "Potato",
  )
  {
    IsSuccess
    Message
    Status
    Result {
      requestId
    }
  }
}

query {
  retrieveBioMass(
    polygonId:    "[YOUR POLYGON ID GOES HERE]"
    startDate:    "2023-01-01"
    endDate:      "2023-07-31"
    analysisType: "Other",
  )
  {
    IsSuccess
    Message
    Status
    Result {
      tif
      png
      colorlegend
    }
  }
}

Please refer to the Schema Documentation in the API Playground for more information.