BWhat changed
Isolated the aerobic nitrogen-fixing microorganism named Azotobacter, adding a distinct route for investigating biological nitrogen acquisition outside a plant-root symbiosis.
Scientific scope
Isolated the aerobic nitrogen-fixing microorganism named Azotobacter, adding a distinct route for investigating biological nitrogen acquisition outside a plant-root symbiosis. Scope limitation: The scope is Azotobacter isolation, not the first discovery of every form of biological nitrogen fixation. Earlier symbiotic and anaerobic work remains distinct. Institutional historical evidence supports this entry; this record does not include a direct check of the 1901 original article or later pure-culture measurements.
Evidence
Assessment uses the catalogue-linked source evidence for the stated contribution. The scope is Azotobacter isolation, not the first discovery of every form of biological nitrogen fixation. Earlier symbiotic and anaerobic work remains distinct. Institutional historical evidence supports this entry; this record does not include a direct check of the 1901 original article or later pure-culture measurements.
Contributors
- Martinus Willem Beijerinck · SCIENCE: Named source contributor; exact labor shares are not measured.
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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