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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. Effects of different sources of fertilizer nitrogen on growth and nutrition of western hemlock seedlings /
    By: Radwan, M. A., - DeBell, Dean S. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.) - United States.
    Publication info: Portland, Or. :Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service,1980.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Effect of nitrogen on  Nitrogen fertilizers  Plants  Western hemlock  
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  3. Effects of manganese and manganese-nitrogen applications on growth and nutrition of Douglas-fir seedlings /
    By: Radwan, M. A., - DeBell, Dean S. - Shumway, John S. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.) - United States.
    Publication info: Portland, Or. :Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service,1979.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Douglas fir  Effect of manganese on  Effect of nitrogen on  Fertilization  Forest soils  Nitrogen fertilizers  Plants  
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  4. Effects of nitrogen and phosphorus fertilizer on planted ponderosa pine in west-central Idaho /
    By: Jacobsen, Glenn L. - Ryker, Russell A. - Thompson, Richard A. - Intermountain Forest and Range Experiment Station (Ogden, Utah) - United States.
    Publication info: Ogden, Utah :Intermountain Forest & Range Experiment Station,1980.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Growth  Idaho  Nitrogen fertilizers  Phosphatic fertilizers  Ponderosa pine  Trees  
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  5. 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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  6. Proceedings.
    By: Alberta Soil Science Workshop. - Soil Science Workshop - Western Canada Nitrogen Symposium - Western Canada Phosphate Symposium
    Publication info: [Edmonton, Alta. :Alberta Agriculture],1962-
    Contributed by: University of Alberta Libraries (archive.org)
    Subjects: Alberta  Congresses  Fixation  Nitrogen  Nitrogen content  Nitrogen fertilizers  Research  Soil acidity  Soil erosion  Soil management  Soil microbiology  Soil science  Soils  Soils, Salts in  
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  7. Response of a pole-size ponderosa pine stand to nitrogen, phosphorus, and sulfur /
    By: Cochran, P. H. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Or. :Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture,[1978]
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Deschutes National Forest  Fertilization  Forest soils  Growth  Nitrogen fertilizers  Oregon  Ponderosa pine  
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  8. Seven-year response of 35-year-old Douglas-fir to nitrogen fertilizer /
    By: Miller, Richard E. - Pienaar, Leon V. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Or. :Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service,1973.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Fertilization  Forest soils  Growth  Nitrogen fertilizers  Trees  
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  9. 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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  10. Ten-year results of fertilizing grand fir, western hemlock, western larch, and Douglas-fir with nitrogen in northern Idaho /
    By: Graham, Russell T. - Tonn, Jonalea R. - Intermountain Research Station (Ogden, Utah)
    Publication info: [Ogden, Utah] :U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station,1985.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Effect of nitrogen on  Fertilizers  Idaho  Nitrogen fertilizers  Plants  Trees  
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