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        "description": "This records the 1837–1838 experiments as reconstructed and criticized by contemporary Rothamsted researchers. It does not claim Boussingault identified microbial nitrogen fixation or resolved every nitrogen source.",
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      "statement": "# Boussingault: measuring nitrogen inputs and crop outputs\n\nUsed controlled plant-growth and chemical measurements to compare nitrogen present before and after growth, exposing different results for cereals and legumes.\n\n## Scientific scope\n\nThis records the 1837–1838 experiments as reconstructed and criticized by contemporary Rothamsted researchers. It does not claim Boussingault identified microbial nitrogen fixation or resolved every nitrogen source.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nJean-Baptiste Boussingault\n\nThe named authors contributed to this scoped work; individual effort shares and later applications are not assigned by the byline.\n\n\n\n## Original sources\n\n- [Lawes, Gilbert and Pugh, On the Sources of the Nitrogen of Vegetation (1861)](https://repository.rothamsted.ac.uk/download/0dacb0bc275ec0ad383dcef301dd3f0560340f4d1630495a8fe9e23f7310a22a/15132293/1861.pdf)\n",
      "summary": "Used controlled plant-growth and chemical measurements to compare nitrogen present before and after growth, exposing different results for cereals and legumes.",
      "title": "Boussingault: measuring nitrogen inputs and crop outputs"
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    "title": "Boussingault: measuring nitrogen inputs and crop outputs",
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