over 60 million acres of land in the united states has weeds that are resistant to the herbicide glyphosate (commonly known as roundup). glyphosate became widely available in the 1970s, and glyphosate-resistant crops were introduced so that farmers could spray their fields without harming their crops. after retiring as a professor of plant biology, dr. smith has decided to become a farmer and is concerned about the extra cost of roundup-ready seeds as so many weeds have evolved resistance to glyphosate. dr. smith decided to test the common agricultural weeds present on her 500-hectare farm to see if they were resistant to glyphosate. here are the results.
