Could robot weedkillers replace the need for pesticides?

The robotic services allow farmers to rely less on chemicals. 'This solves a lot of problems,' workers sayOn a sweltering summer day in central Kansas, farm fields shimmer in the heat as Clint Brauer watches a team of bright yellow robots churn up and down the rows, tirelessly slicing away any weeds that stand in their way while avoiding the growing crops.The battery-powered machines, 4ft (1.2 metres) long and 2ft (0.6 metres) wide, pick their way through the fields with precision, without any human hand to guide them. Continue reading...