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Interpreted as:
title:(Biological AND nitrogen AND fixation AND in AND organic AND farming AND systems)
Suggestions: Include records that partially match the query
Biological nitrogen fixation in organic farming systems
Year: 1996
Language: English
Biological nitrogen fixation in an organic farming system
Year: 1996
Language: English
Biological nitrogen fixation in an organic farming system
International Federation of Organic Agriculture Movements, 11th Ifoam Scientific Conference — 1996
Year: 1996
Language: English