The Green Normalised Difference Vegetation Index (GNDVI) is an index of plant "greenness" or photosynthetic activity. It is one of the most commonly used vegetation indices to determine water and nitrogen uptake into the crop canopy. GNDVI basically replaces the red piece of standard NDVI collection with a very specific band of light in the green range to obtain different useful information.
Water must be used effectively. Frequent GNDVI displays from Stratus Imaging allows for irrigation optimisation and indicates when water isolation occurs or varies throughout the field in a glance. Using this data, along with the GPS coordinate information pinpointing the problem areas to determine solutions is very valuable and can also help provide material application, grade correction or root stock improvement to make your fields more uniform in water retention and utilisation.
Water is also a main factor required for photosynthesis. Using GNDVI images you can allocate water efficiently to the areas that need it most.
- By monitoring the proper grade of the field to improve flood row irrigation.
- With drip irrigation, clogged lines can be found, optimizing how the drip irrigation is set up.
The GPS coordinate information used with the individual plant requirements allows for accurate variable rate spreading. This feature alone, when properly utilized, can more than pay for itself and the entire service in a single application