Very interesting article. I think robots will be used more and more for agricultural applications as time goes on.
One important thing to consider is the economic costs/benefits of using robots. Farming typically has low profit margins and the use of any expensive equipment (including robots) must be economically justified by the farmer. If the costs are low, then robotic farming would make sense.
Unlike industrial robots, which suffered a slight overall slump in 2012, service robots continue to be increasingly in demand. The majority are used for defense, such as unmanned aerial vehicles (UAVs); and agriculture, such as milking robots.
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