Note- If a URL is outdated you may be able to find a copy of the article by entering the URL into the search field at http://www.archive.org/.

• Satellite photo URL: http://www.fas.usda.gov/pecad/highlights/2000/08/zim824.html
• Corn yields: the above URL and also http://www.fao.org/WAICENT/faoinfo/economic/giews/
  english/alertes/2000/SA307ZIM.html
• 2.7 million hectares of arable land URL: http://www.odci.gov/cia/publications/factbook/geos/zi.html
• Average planting: page 15 of this PDF http://www.fews.org/va/zi/1999-00/9900fewsziva.pdf. This PDF is one of the best sources on Zim agriculture.
• calorie needs page 12 of above PDF.
• Drought harvest numbers page 6 of this PDF: http://www.imf.org/external/pubs/ft/scr/1999/cr9949.pdf
• 40% of income from outside page 33 of this PDF http://www.fews.org/va/zi/1999-00/9900fewsziva.pdf.