Crop improvement, adoption and impact of improved varieties by Tomas S. Walker, Jeffrey R. Alwang

By Tomas S. Walker, Jeffrey R. Alwang

Following on from the CGIAR research by way of Evenson and Gollin (published by means of CABI in 2003), this quantity offers updated estimates of adoption results and productiveness affects of crop type development learn in sub-Saharan Africa. The e-book stories at the result of the DIIVA undertaking that focussed at the varietal new release, adoption and impression for 20 meals plants in 30 nations. It additionally compares adoption results in sub-Saharan Africa to these in South Asia, and courses destiny efforts for worldwide agricultural learn

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1997). Intra-Regional Differences The aggregate spending picture presented above obscures important differences within SSA. These differences include stark heterogeneity in national system size and quality, and different patterns of investment over time and within systems. , 1997). This unevenness makes it difficult to make generalizations from aggregate trends; the aggregates obscure major differences across countries and for individual years. For example, investments in the Nigerian system grew during the 1960s and 1970s as oil revenues boomed, but shrunk dramatically during the 1980s to the point where they were (in 1991) less than one-half what they were in the 1970s.

Alwang (NARS) in the countries of sub-Saharan Africa. Beginning in 1968, the International Agricultural Research Centers (IARCs) have been a partner in that effort. That seems like a long time ago but it is a recent undertaking compared to the genetic improvement in export crops, such as cocoa, cotton and rubber, that occurred much earlier in the 20th century. In spite of its youth, crop genetic improvement in food crops is not as vigorous or widespread as it should be in sub-Saharan Africa. Its effectiveness is compromised for multiple reasons.

A global monitoring and evaluation research agenda (referred to here as the 1998 Initiative) retrospectively assessed varietal output, adoption and production impacts in food-crop genetic improvement in developing country agriculture (Evenson and Gollin, 2003). That initiative resulted in several surprises including the realization that dynamic varietal change was not confined to the so-called Green Revolution period between the mid-1960s and the early 1980s, but that it continued deep into the 1990s.

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