Jason Lusk points out the reality of the global N-cycle:
..The NPR Planet Money podcast just ran an interesting episode about the challenges a farmer started having with bald eagles when he went organic and started raising chickens outdoors. It's a nice story, but I want to take a minute to correct a subtle (but important) message about organic production promoted in the podcast that is widely mis-understood. It has to do with the nitrogen cycle. Here is Planet Money:
“He went organic. He started making changes. To replace the chemical fertilizer, he brought in chickens and let them roam free. Free-range chickens would fertilize the grass; the grass would nurture the cattle, and shoppers at Whole Foods would love Harris’s organic beef.”
Here is the problem – the “chemical fertilizer” wasn't actually replaced (at least not fully)…