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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. - Gilbert, J. H. - American Association for the Advancement of Science.
    Publication info: London :Harrison,1883.
    Contributed by: Canadiana.org (archive.org)
    Subjects: Experimentation  Nitrogen  Nitrogen content  Soils  
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  2. Efficient use of nitrogen on crop land in the Northeast /
    By: Barker, Allen V.,
    Publication info: New Haven :Connecticut Agricultural Experiment Station,1980.
    Contributed by: University of Connecticut Libraries (archive.org)
    Subjects: Effect of nitrogen on  Nitrogen content  Northeastern States  Plants  Soils  
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  3. The importance of runoff and winter anoxia to P and N dynamics of a beaver pond / report prepared by Kevin J. Devito and Peter J. Dillon.
    By: Devito, Kevin John, - Dillon, P. J. - Ontario.
    Publication info: [Toronto] :Queen's Printer for Ontario,1992.
    Contributed by: Ontario Ministry of the Environment (archive.org)
    Subjects: Environment aspects  Lake ecology  Nitrogen  Nitrogen content  Ontario  Phosphorus  Phosphorus content  Stream ecology  Water  
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