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

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

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In Indonesia, a spline linear regression indicated different slopes for initial years versus recent years (see Fig. 2). org). 2). 4% in 2000. 3% per year to 2020. A linear rate of yield gain of 63 kg ha−1 year−1 would be required to meet demand, which is less than the rate of gain in global maize yield in the past 34 years (Fig. 1). In contrast, linear rates of gain in rice and wheat yields since 1966 are sufficient to meet predicted global demand in 2020 if these rates are maintained. Large variation in rates of yield gain is evident in different countries (Fig.

Heidhues to play. Modern communication and transport systems allow the bringing together of specialists of different disciplines worldwide to address multifaceted issues of food security and nutrition in an integrated way. 2. Food needs are continuing to increase. Given the limited possibilities of expanding cultivated area, raising natural resource productivity is of utmost importance. The trend of declining rates of yield increases is a matter of concern. The big potential that modern science offers needs to be mobilized for food research.

3). National and Household Food Security: a Complex Issue Behind these overall developments are enormous differences between and within regions, calling for a more differentiated look at food security. In fact, world food security does not guarantee national food security, and national food security does not ensure that all households are food secure. Even 20 F. Heidhues Fig. 2. Net cereal imports of major developing regions, 1995 and 2020. Source: IFPRI IMPACT simulations, July 1999, in Pinstrup-Andersen et al.

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