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How much fertilizer is too much for Earth's climate?

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tractor  in a corn field at the NSF Kellogg Biological Station LTER site.

Applying nitrogen fertilizer to corn at the NSF Kellogg Biological Station LTER site.

Credit: J.E. Doll, MSU


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A Michigan corn field east of the Kellogg Biological Station LTER site.

A Michigan corn field east of the Kellogg Biological Station LTER site.

Credit: J.E.Doll, MSU


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View of a Kellogg Biological Station LTER experiment to test how crops respond to nitrogen.

View of a Kellogg Biological Station LTER experiment to test how crops respond to nitrogen.

Credit: K. Stepnitz, MSU


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corn in mid-August at the Kellogg Biological Station LTER site.

Good crop: Corn in mid-August at the Kellogg Biological Station LTER site.

Credit: J.E.Doll, MSU


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Researcher AJ Ozanich collects greenhouse gas samples in a Kellogg Biological Station corn field.

Researcher AJ Ozanich collects greenhouse gas samples in a Kellogg Biological Station corn field.

Credit: K. Stepnitz, MSU


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LTER scientist Kevin Kahmark next to equipment analyzing samples in the lab.

LTER scientist Kevin Kahmark analyzes greenhouse gas samples in the lab.

Credit: K. Stepnitz, MSU


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