อ้างอิง ของ เกษตรกรรม

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  2. ↑ Philpott, Tom (19 April 2013). "A Brief History of Our Deadly Addiction to Nitrogen Fertilizer". Mother Jones. สืบค้นเมื่อ 7 May 2013.
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  4. ↑ "CAP Reform". European Commission. 2003. สืบค้นเมื่อ 15 April 2013.
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  6. ↑ "The global grain bubble". The Christian Science Monitor. 18 January 2008. สืบค้นเมื่อ 26 September 2013.
  7. ↑ "The cost of food: Facts and figures". BBC News Online. 16 October 2008. สืบค้นเมื่อ 26 September 2013.
  8. ↑ Walt, Vivienne (27 February 2008). "The World's Growing Food-Price Crisis". Time.
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  10. ↑ Mortished, Carl (7 March 2008)."Already we have riots, hoarding, panic: the sign of things to come?", The Times (London).
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  12. ↑ "Food prices: smallholder farmers can be part of the solution". International Fund for Agricultural Development. สืบค้นเมื่อ 24 April 2013.
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  23. ↑ "NIOSH Workplace Safety & Health Topic: Agriculture". Centers for Disease Control and Prevention. สืบค้นเมื่อ 16 April 2013.
  24. ↑ "NIOSH Workplace Safety & Health Topic: Agriculture". Centers for Disease Control and Prevention. Retrieved 16 April 2013.
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  30. ↑ "http://faostat.fao.org/". External link in |title= (help)
  31. ↑ "http://faostat.fao.org/". External link in |title= (help)
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  42. ↑ Brady, N.C.; Weil, R.R. 2002. "Practical Nutrient Management" pp.472–515 in Elements of the Nature and Properties of Soils. Pearson Prentice Hall, Upper Saddle River, NJ.
  43. ↑ Acquaah, G. 2002. "Plants and Soil Water" pp.211–239 in Principles of Crop Production, Theories, Techniques and Technology. Prentice Hall, Upper Saddle River, NJ.
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  53. ↑ Conversion note: 1 bushel of wheat = 60 pounds (lb) ≈ 27.215 kg. 1 bushel of maize = 56 pounds ≈ 25.401 kg
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