Researchers with the Future Farm Industries Cooperative research Centre are employing the UAV to take photos of mallee trees at their trial site in Narrogin, as part of the new Woody Crop Industries program focusing on mallee trees as a source of biomass.
CSIRO’s Richard Bennett says the images produced from the UAV will enable researchers to estimate the biomass yield from a plot of trees as well as test variables such as soil and irrigation to maximise production.
“The traditional way of doing things is to measure each tree for its length, width and height, then cut that plot down, weight it, and from that determine the ratio between a tree’s measurements and its biomass yield. With that ratio, we can determine the biomass yield for any given plot of trees that we have taken measurements for,” Mr Bennett says.
“It’s very labour intensive, requiring about two days to measure 1500 trees.
“What we do with the UAV, is take an aerial image of the plot and work out how many pixels have tree leaves in them. Once we know that number of pixels of the plot and have measured the trees, we can determine the ratio between how many pixels in an aerial shot and what amount of biomass will be produced.”
By Aaron Fernandes
06 November 2012