Interest is growing rapidly in the use of unmanned aerial vehicles (UAVs) for precision agricultural and environmental uses.
Media reports show agriculture could potentially be the largest user of this developing technology.
Most of the practical applications of UAVs so far have occurred in Europe and in countries like Canada, Australia and Japan where there are fewer airspace regulations compared to United States.
Use of UAVs for commercial purposes is prohibited in the United States; only hobbyists are allowed to fly small, radio-controlled airplanes for recreational purposes.
Currently, there are two broad platforms for UAVs, namely the ‘Fixed Wing’ and ‘Rotary Wing’ (copter) types.
Fixed wing UAVs have the advantage of being able to fly at high speeds for long durations with simpler aerodynamic features. Some of them do not even require a runway or launcher for takeoff and landing.
The rotary wing UAVs have the advantage of being able to take off and land vertically and hover over a target. However, because of mechanical complexity and shortened battery power, they have a short flight range.
These UAVs fly up to an altitude of 400 feet and are able to follow the same path or GPS-guided routes daily, weekly or as desired.
Cameras gather images with normal light, infrared or thermal, still photos or video formats. These images are digitized, geo-referenced and mapped.
Many on-farm uses
Crop consultants and farmers can use this information to scout crops, detect nutrient deficiencies, assess flood or drought damage, forecast weather patterns, monitor wildlife and even locate cattle in distant pastures.
Research also reveals that UAVs can be used for detecting atmospheric microbes and air pollution.
Spot-spraying chemicals and micronutrients is another use.
Some major non-agricultural uses of UAVs include news reporting, photography, surveillance, traffic control, real estate and search and rescue missions.
Satellite images are currently used for remote sensing, but they are costly and do not have the desired resolution. Satellite images are also affected by cloud cover.
Because of the growing interest and potential demand for this technology, the U.S. Congress has directed the Federal Aviation Agency (FAA) to write regulations on how the UAV technology can be used for commercial purposes and specify restrictions for their use.
The progress has been slow, however, because of public safety and privacy concerns, and objections from consumer rights groups. The FAA currently allows special certifications for non-profit organizations such as universities and the military to test whether these devices can safely be integrated into the national air space. The expectation is that the FAA will formulate these regulations sometime next year.
Delays in drafting guidelines and the legislative debate process can stifle research and development of this technology by local designers and entrepreneurs. Dozens of U.S. companies have already invested and are competing in the global UAV market. The UAV industry has the potential to provide thousands of high-tech jobs in this country.
Article from Southeast Farm Press by By George Silva, Michigan State University.
UAV and Agriculture Uses
Don’t call unmanned aerial vehicles “drones” when you’re talking to Rory Paul. “When we hear ‘drone,’ the popular media has us seeing military predator systems with Tomahawk missiles slung underneath,” said Paul, CEO of Volt Aerial Robotics.
“What we’re talking about are farming implements that fly, that are doing work on your farm.” Paul prefers to call them unmanned aerial vehicles or UAVs. He shared how radio-controlled UAVs can be used for crop scouting and other agricultural applications at the Iowa Soybean Association On-Farm Network Conference in Ames. Paul said there are different types and sizes of unmanned aircraft —military systems and agricultural equivalents. ”Next time you hear ‘drone,’ you can ask what type, what size, what it does,” Paul said.
“I believe they have huge potential to benefit agriculture.”
Paul doubts that large predator-sized UAVs will ever fly over fields. ”It’s the small UAVs that we should be interested in because they can do a lot of work for agriculture,” he said. Whether farmers can operate UAVs on their farms for agricultural purposes is a grey area, Paul said. They can fly a radio-controlled plane with an autopilot in it for recreation up to 400 feet. UAVs can be used for mapping land. It provides high resolution with down to sub-inch accuracy.
Crop scouting is another use. A farmer can stand on the edge of the field with a ground station and see what a UAV camera sees over a field. Farmers can use UAVs to take population counts from multiple spots in the field in a fraction of the time it takes to do on foot. Spraying, especially spot spraying, is another application. Paul also sees a time when pollination and sampling could be done with UAVs. ”The sky is the limit,” he said. By Jean Caspers-Simmet firstname.lastname@example.org