“Weeding has been a long-standing problem for many years because there is no silver bullet—there are just too many variables. And for organic farmers, their options are very limited. Their options are either chemical, laborious or expen­sive,” says Tang. “My robot design offers the producer a more effective and sustain­able alternative.”

Source: www.engineering.iastate.edu

According to the NYTimes article linked below, Lie Tang hopes to have his weeding robot ready for testing next spring.

http://www.nytimes.com/2014/12/01/business/working-the-land-and-the-data.html