"This technology should provide an opportunity to see parts of the field even down to the leaf level, " said Phil Hamm, director of the Hermiston Agricultural Research and Extension Center at Oregon State University.

WSJ: Farmers Experiment With Drones

In addition, a new lower priced entry-level LEAF S grade joins the previous SV and SL grades, while an array of feature enhancements are added to the LEAF SL grade, including leather-appointed seating and 17-inch aluminum-alloy wheels.

ENGADGET: Nissan starts US production of 2013 Leaf, vows faster charging and a lower entry price

Cars bought with leased batteries will be known as 'Flex' models and buyers will be able to get behind the wheel of an entry-level Visia LEAF .

ENGADGET: New Nissan Leaf comes to the UK with battery leasing option, extended range

The entry trim level would be positioned below the two higher-spec Leaf versions currently on the market, Automotive News said, and will debut as part of a 2013-model facelift for the entire Leaf line.

FORBES: How Low Can Leaf Go? Nissan May See With Budget Version