We are running long term trials on various products’ influence on citrus tree growth. I took reference photos of each tree at the start of the trial (jpeg unfortunately). We would like to establish a number that represents the tree biomass on the photo in order to calculate a % growth over time for each treatment.
I could not find any thread that looked like it could provide an answer/ strategy.
There are several strategies to measure the tree growth or biomass non-destructive (Destructive: I used to scan all leaves of a special grass plant and then applied ImageJ particle analysis to measure all scanned leaves for the area, etc.).
If using ImageJ you can set the scale (from a known length in the vicinity of the tree - the illuminaton could be improved), threshold the image and measure the height and area (or tree crown) in several ways, e.g.:
Here you find a massive amount of tutorials and YouTube links, see: