From BBC:

Billion-dollar drone company DJI is expanding from consumer and camera drones into the agriculture industry.

The Chinese firm's latest model is a crop-spraying drone, which it claims is "40 times more efficient" than manual spraying, despite having just 12 minutes of flight time.

It will be released in China and Korea where hand-spraying is more common.

DJI made $500m (£332m) in drone sales in 2014 and some analysts predict the firm will hit $1bn in sales this year.

The Agras MG-1 has eight rotors and can carry up to 10kg of crop-spraying fluids per flight.

The foldable device is also dustproof, water-resistant and made of anti-corrosive materials, the firm says on its website (in Chinese).