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  1. Economic effects of controls on nitrogen fertilizer / E.R. Swanson, C.R. Taylor, and P.J. Van Blokland.
    By: Swanson, E. R. - Taylor, C. R. - Van Blokland, P. J.
    Publication info: Urbana :Agricultural Experiment Station, College of Agriculture, University of Illinois at Urbana-Champaign,1978.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Control  Economic aspects  Environmental aspects  Illinois  Nitrogen fertilizers  
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  2. Nitrogen use and behavior in crop production / L. Fred Welch.
    By: Welch, L. Fred,
    Publication info: Urbana, Ill. :Agricultural Experiment Station, College of Agriculture, University of Illinois at Urbana-Champaign,1979.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Assimilation  Nitrogen fertilizers  Plants  
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  3. Soil and crop interrelations of various nitrogenous fertilizers : Windsor lysimeter series b /
    By: Morgan, M. F. - Jacobson, H. G. M.
    Publication info: [New Haven] :Connecticut Agricultural Experiment Station,1942.
    Contributed by: University of Connecticut Libraries (archive.org)
    Subjects: Connecticut  Effect of nitrogen on  Lysimeter  Nitrogen fertilizers  Plants  
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