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  1. Determinations of nitrogen in the soils of some of the experimental fields at Rothamsted and the bearing of the results on the question of the sources of the nitrogen of our crops / by Sir John Bennet Lawes and Joseph Henry Gilbert.
    By: Lawes, J. B. (John Bennet), Sir, - Gilbert, J. H. Sir, - American Association for the Advancement of Science.
    Publication info: London :Harrison,1883.
    Holding Institution: Canadiana.org (archive.org)
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