"Farmers who planted their entire field would earn about $27,000 in profit per farm, whereas those who left a third unplanted for bees to nest and forage in would earn $65,000 on a farm of similar size."
http://www.nytimes.com/2014/07/15/opinion/bees-and-colony-collapse.html?mabReward=RI%3A7&action=click&pgtype=Homepage®ion=CColumn&module=Recommendation&src=rechp&WT.nav=RecEngine&_r=0
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