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"Scientists at Blue River Technology will commercialize a weed-killing robot after landing $3.1 million in Series A funding from Khosla Ventures. The agricultural invention uses algorithms to differentiate between good and bad plants, injecting the bad with enough fertilizer to kill it. \nIf you've ever tried to grow your own garden, you know how impossible it is to keep up with the weeds. Keeping non-native vegetable plants alive while trying to keep native plants out is a losing battle, which is why many simply turn to herbicides to speed up the process. \nBut the use of chemicals around our food is proving to be quite the health and environmental danger these days, so going back to hand-pulling those weeds is, until now, our only alternative.\nCurrently, the automated farmer can only detect lettuce plants from non-lettuce plants, but expanding its crop knowledge is a simple matter of programming. The wheeled bot is still in the prototype stage at this point. But Blue River sees its machine as a cost-effective and safer solution to potentially reduce U.S. herbicide use by more than 250 million pounds per year."^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2012/09/11/weed-killing-robot/>