Now showing items 31-40 of 44
The rate of crop varietal replacement on farms: measures and empirical results for wheat
The rate of crop varietal replacement on [arms is an important measure of the impacts of plant breeding programmes, the degree of varietal diversification over time, and the potential exposure to disease epidemics due to ...
Has the green revolution been sustained? The quantitative impact of the seed-fertilizer revolution in Pakistan revisited
Quantitative impacts of the Green Revolution on food production in the Pakistan Punjab are reviewed and the effects of different technologies on wheat yields over the past two decades decomposed. New quantitative evidence ...
Past and potential impacts of maize research in Sub-Saharan Africa: A critical assessment
Over the past twenty years, research progress in maize, the single most important food staple in sub-Saharan Africa, has been comparable to progress in other primarily smallholder maize systems in the developing world, ...