Basic Nitrogen Management in Sugar Beet

Objective

This guide aims to show the steps that must be followed to view the Nitrogen status of the sugar beet plant and make a comparison between different plots.

1. Selección de campos en Layers

Once inside the profile, you must search for the plots of interest for the study. For this, you can filter by farmer’s name where all the farmer’s plots appear or by plot name. Once the desired ones are selected, access them through the icon located next to the name filter.

2. Acceso al panel de nitrógeno

Una vez seleccionada la imagen, accedemos al panel de Dashboard (botón superior derecho). Una vez dentro, debemos ir a “Season evolution” para que aparezca el grafico de evolución de nitrógeno. Desde el Dashboard, seguimos disponiendo del filtro de búsqueda por nombre por si queremos modificar el listado de parcelas a mostrar en el gráfico.

It is represented in two different graphs: on one side, Total Nitrogen per week, which serves to compare the content with another plot, and nitrogen content by date.

2.1.

Compare the nitrogen status with the top 25% of fields with the best Sucrose production.


Gráfico evolución nitrógeno por semana de cultivo.

Evolution of total nitrogen measured in % each week since planting

  • Through week 10, nitrogen is found above 25% of the plots with the highest sucrose content.

  • From week 10, it decreases compared to the rest. Farmer: Check that sufficient fertilizer has been applied, around week 10.

2.2


Gráfico evolución nitrogeno por fecha.

3. Descarga de ficheros: Shape y PDF

It is possible to view and export the nitrogen distribution within the plot to PDF and Shape formats. Although this is qualitative information, having an average quantitative value for the plot allows extrapolation to the entire plot. To do this, you must first select the image on which you want to visualize the zones with different nitrogen content. Only use satellite images without clouds, as clouds would interfere with the results.


Imagen de satélite sin nubes.

To access the file download tool, use the first icon located on the left margin and only one plot must be selected.


Icono generación de ficheros.

3.1. PDF Generation

For PDF generation, it is necessary to provide a filename and select the spectral index on which we want the map to be based. To obtain the nitrogen-chlorophyll distribution, we need the NDRE index.


Herramienta generacion PDF.


Herramienta generacion PDF Indice espectral.

Below is an example of an NDRE nitrogen distribution map, showing a section with the area corresponding to each class, with a total of 5 classes plus one for soil and another for clouds.

In this example, it is shown how the central and lower parts of the plot have a higher nitrogen content, with lower levels in the upper edges.


Herramienta generacion PDF Indice espectral.

3.2. Shape Generation

For this information to be processed and read by a tractor or machine, it must be exported in Shape format. This tool, as with the PDF, allows you to name the file and select the layer of interest, in this case based on the NDRE nitrogen-chlorophyll index. It also allows you to select the pixel size, which is the resolution at which you want to view the map. The smaller the number, the more detail you will see and the more it will be discretized. There is also the option to assign a value to each color, based on AIMCRA recommendations or the desired application rate.


Generación de archivo Shape.

Download files with the following extensions.

Export file and classify by colors.