Crop science : progress and prospects by Hartwig H Geiger; Josef N?osberger; Paul Christiaan Struik PDF

Environmental Studies

By Hartwig H Geiger; Josef N?osberger; Paul Christiaan Struik

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Household food security is conditioned by a complex set of factors that go far beyond the food production and trade domain. Household food security is not just a matter of producing sufficient food and ensuring its availability in adequate quantities and quality; it also requires creating the possibility for households to acquire the needed food and to access the knowledge necessary to use food properly. Thus, a household’s food security is directly linked to poverty and a household’s access to the food needed.

Total area cropped to maize, rice and wheat from 1966 to 1999. Crop Period Areaa (106 ha) Maize 1966–1969 1996–1999 112 140 (+25%) Rice 1966–1969 1996–1999 129 152 (+18%) Wheat 1966–1969 1996–1999 220 225 (+ 2%) a Mean area cropped during each of the indicated 4-year periods. Values in parentheses are the % increase between 1966–1969 and 1996–1999. Research to Assure Food Security 35 Fig. 1. Global yield trends of maize, rice and wheat from 1966 to 1999. Estimates of the rate of yield gain were obtained by linear regression of yield versus year.

Oxford, New Delhi (in press). Bridges, M. and Oldeman, R. (2001) Food production and environmental degradation. J. and Sambanpanit, S. (eds) Response to Land Degradation. Oxford, New Delhi (in press). Constanza, R. and d’Arge, R. (1997) The value of the world’s ecosystem services and natural capital. Nature 387, 253–260. T. (2000) Save our soils – research to promote sustainable land management. The Food and Environment Tightrope. The Crawford Fund, ACIAR, Canberra, pp. 86–96. Crosson, P. (1995) Future supplies of land and water for world agriculture.

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