Page 7 - Workswell Catalogue

or to the does 6
quickly enough a�er applying the interven�on. The NDVI shows the impact and result
NDVI is used to detect live green plant canopies in mul�spectral remote sensing data.
It is very difficult to make the right interven�on as you cannot monitor the response
You observe the long-term effects of stress factors and environmental condi�ons on
be�er ac�on from tell interven�on
So you can only quan�fy the photosynthe�c capacity of plant canopies in that �me.
Index range 0.33 - 1 feeling are Crops worse, but it is not clear from the NDVI map why and whether they are currently under stress. correc�ve Any improve their condi�on will not be reflected quickly in the NDVI picture and will be difficult to evaluate. Index range 0 - 0.33 Crop has already died and it is to impossible picture how this happened and what interven�on would help. Co
the state of vegeta�on but it is o�en very difficult to iden�fy the causes.

Normalized Differen�al Vegeta�on Index
NDVI 0.96 0.86 0.76 0.66 0.56 0.47 0.37 0.27 0.17 0.07 Healthy Moderately Healthy Dead crop UAV

Not the process but the result a�er longer period of �me.

INDEX COMAPRISON

NDVI Dead or live It is too late!

VS

the process is s�ll reversible. The effec�veness of the interven�on can be evaluated
You can take ac�ons before the crops die, ie when the stress is already occurring but
You observe the actual crop's physiological process under given condi�ons at a given
�me. This is great, for example, for controlling of irriga�on systems or loca�ng
Crop Water Stress Index Situa�on in a real �me See the current situa�on! You can se how "it works" and how to vegeta�on infested by pests. immediately a�er applying it.
CWSI Physiological process Before it's too late!
"improve it" in a real �me. Interven�on could be evaluated during a few hours.

CWSI is very low. Water could be be�er distributed over the land or saved. No Under the correct irriga�on The water stress level corresponds to situa�on current the precipita�on). Irriga�on helps prevent crop damage and works properly. The irriga�on system is not func�oning properly and part of the crop is wil�ng.
Water was�ng drought effect. no day, (sunny High level of stress High level of water stress.