SYSTEM INTEGRATION & AUTOMATION
overheat,” he says. “When the crop is low on water it can’t transpire as much to stay cool, so we’re trying to pick up on that signal.”
The trick, he says, is that the signal is fairly small, and by the time the canopy is really hot, there has already been yield loss. The team also collected multispectral data to keep track of canopy cover and vegetation growth stages such as normalized difference vegetation index (as shown in figure 1). Understanding how to read the canopy temperature and integrating the technology into the center pivot can lead to an easier way to determine when an irrigation event is necessary.
Figure 1. The research team collected multispectral data to keep track of crop growth as indicated by the normalized difference vegetation index and compared data from the pivot-mounted sensors to data from satellites and unmanned aircraft systems.
farmers to transition from overwatering to watering the right amount,” he says.
“Hopefully technology like this and automated pivots will make it easier for
Looking forward, Heeren is utilizing a second year of funding from the IIC to continue the research, as the thresholds will be most valuable with several years of field data collection, he says. With an
eye to implementation, Heeren is looking forward to continued collaboration with the irrigation industry.
Kyle Brown & Lighting magazine. Brown will become the with the Spring 2022 issue.
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irrigationtoday.org Winter 2022 | Irrigation TODAY 17
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