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. 1999 Feb 16;96(4):1175-80.
doi: 10.1073/pnas.96.4.1175.

Nitrogen fertilizer: retrospect and prospect

C R Frink  1 , P E Waggoner, J H Ausubel
Affiliations

Nitrogen fertilizer: retrospect and prospect

C R Frink et al. Proc Natl Acad Sci U S A. .
No abstract available

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Figures

Figure 1
Figure 1
The world rise in millions of metric tons (Tg) of N in fertilizer, and plotted above each year, the annual percentage change in the world and U.S. calculated from 4 yr before until 5 yr later [source: World, http://www.fertilizer.org; for U.S., Agricultural Handbook 712 (USDA, Washington, DC, 1997) and http://mann77.mannlib.cornell.edu/data-sets/inputs/86012].
Figure 2
Figure 2
The changing components that drive world use of N fertilizer plus the changing ratio of fertilizer to crop in the U.S. Change was estimated as in Fig. 1 (source: Population, www.census.gov/ipc/www/worldpop.html; GDP, sent by Endang Setyowati from World Development Indicators 1998, converted to constant dollars 1965-end by World Bank and 1960–1964 by P.E.W. by extrapolating deflator; Crops, http://apps.fao.org/cgi-bin/nph-db.pl plus various U.S. Census and agriculture sites).
See this image and copyright information in PMC

References

    1. Vitousek P M, Aber J D, Howarth R W, Likens G E, Matson P M, Schindler D W, Schlesinger W H, Tilman D. Ecol Appl. 1997;7:737–750.
    1. National Academy of Sciences USA. Nitrate and Nitrite in Drinking Water. Washington, DC: Natl. Acad. Press; 1995.
    1. Malakoff D. Science. 1998;281:190–193.
    1. Mosier A R, Duxbury J M, Freney J R, Heinemeyer O, Minami K. Plant Soil. 1996;181:95–180.
    1. Smil V. Cycles of Life: Civilization and the Biosphere. New York: Scientific American Library; 1997. p. 112. , 113, 128–139, 205.

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