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What is NDVI imagery and how can I use it this season?

NDVI imagery - Farm management app - Farm software Australia -DecipherAg
Agriculture

What is NDVI imagery and how can I use it this season?

 

Key points:

  • NDVI imagery is a method of determining crop health by measuring the index of plant greenness
  • NDVI is calculated on a per-pixel basis as the normalised difference between the red and near infrared bands of an image
  • NDVI imagery helps farmers and agronomists identify variability and anomalies in their paddocks, track growth performance and create variable rate maps
  • Check out Decipher’s FREE NDVI imagery

 

What is NDVI?

Normalized Difference Vegetation Index (NDVI) imagery is a method of determining crop health by measuring the index of plant “greenness” or photosynthetic activity, and is one of the most commonly used vegetation indices.

 

How is NDVI calculated?

As seen below, NDVI uses the NIR and red channels in its formula.

ndvi formula

By taking the ratio of red and near infrared bands from a remotely-sensed image, an index of vegetation “greeness” can be defined. NDVI is calculated on a per-pixel basis as the normalised difference between the red and near infrared bands of an image.

 

How is NDVI used in agriculture?

NDVI helps you look for anomalies that may otherwise be impossible to spot with the naked eye, and gives you an understanding of high and low biomass areas.

NDVI can also be used for:

  • Tracking crop growth in-season and compare crop growth between seasons
  • Tracking pasture growth and utilisation
  • Yield forecasting
  • Identifying resistant weeds
  • Targeted fertiliser applications
  • Creating variable rate maps
  • Irrigation scheduling
  • Assessing trials
  • Formulating top dressing strategies
  • Understanding crop dynamics and tracking hail, storm, drift or frost events
  • Picking trends and successful strategies
  • Tracking previous crop performance when purchasing properties

 

Decipher’s award-winning NDVI imagery

Decipher’s FREE NDVI imagery features include:

10m per pixel imagery quality
Daily, monthly and seasonal frequency
Current and past 3 years imagery history
Export coloured imagery

To check it out, simply sign-up for free, and create a farm by drawing or uploading your farm and paddock boundaries as a KML or shape file.

Once the farm has been setup, you can then view NDVI imagery clipped to your whole farm or a paddock, allowing you to easily identify variability and track trends throughout the season.

Watch this video to find out how you can start using Decipher’s NDVI imagery this season:

 


Useful links:

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