Ce numéro de Nature &<p></p>Faune explore la science et<p></p>les innovations (techniques,<p></p>sociales et politiques) qui<p></p>peuvent soutenir la réalisation<p></p>de ce rêve africain.
To meet carbon emissions targets, more than 30 countries have committed to boosting production of renewable resources from biological materials andconvert them into products such as food, animal feedand bioenergy. In a post-fossil-fuel world, an increasingproportion of chemicals, plastics, textiles, fuels and electricity will have to come from biomass, which takesup land. To maintain current consumption trends theworld will also need to produce 50–70 percent more foodby 2050, increasingly under drought conditions and onpoor soils.
As this book shows, farmer field schools have proven to be a very useful approach for helping African farmers to improve how they manage their land and water. Numerous projects throughout Africa have shown that they result in improved soils, better yields and higher incomes for farmers. The document summarizes some of these experiences, points out successes, and – equally important – shows constraints and gaps that need to be addressed.
With the continual rise of global commodity prices and increasing population pressures worldwide, the future of agriculture is looking increasingly unstable. As a result of this escalating demand and intensification of unsustainable agricultural techniques, natural resources are facing an increasing threat of depletion.
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