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nitrogen cycle
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nitrogen cycle
The importance of nitrogen and phosphorus in ecosystems
fava bean nitrogen cycle
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nitrogen cycle: Facts & Related Content

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Also Known As nitrogen budget

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nitrogen cycle
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nitrogen cycle
The importance of nitrogen and phosphorus in ecosystems
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Key People

Pierre-Eugène-Marcellin Berthelot, engraving by Philippe-Auguste Cattelain.
Pierre-Eugène-Marcellin Berthelot
French chemist
Boussingault, Jean-Baptiste
Jean-Baptiste Boussingault
French chemist

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Cross section of Earth showing the core, mantle, and crust
Everything Earth