Pigweed, which can grow 3 inches per day, has become resistant to the dominant weed killer, glyphosate, sold by Monsanto as Roundup. This super weed threatens the nation's soybean and corn crops. U.S. Farmers spent 13.7 billion dollars in 2012 on agricultural chemicals, 70% higher than in 2002. In s...By: MikeTheMaker
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from Instructables: exploring - technology - robots http://ift.tt/1G8Dr2I
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