A research project on improved fallows examined how short-term rotations of selected perennial tree and shrub species impact cereal yields and soil quality in subsistence maize cropping systems. The effects of improved fallows on maize yields were significant when combining a tree species (Gliricidia) and a nitrogen-fixing legume (Stylosanthes). Read more

Le Malawi est confronté à une myriade de problèmes environnementaux, sociaux et sanitaires, y compris l’insécurité alimentaire, la dégradation des terres et la déforestation. Un programme d’agroforesterie promeut la plantation d’arbres pour augmenter les rendements des cultures dans les sols épuisés, lutter contre la déforestation et autonomiser les femmes.

Malawi faces myriad of environmental, social, and human health challenges, including food insecurity, land degradation and deforestation. An agroforestry program promotes tree planting to increase crop yields in previously depleted soils, reverse deforestation, and empower women.
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The evidence in this report suggests that it is more profitable for small-scale farmers in Africa to practise ecological farming that uses no chemical pesticides or fertilisers than it is to use chemicals. Presenting the results of new fieldwork in Malawi and Kenya, this report shows that farmers practising agroforestry (involving the use of natural ‘fertiliser trees’
instead of chemical fertilisers) and ‘Push-Pull’ technology, which eliminates the need for chemical pesticides) achieve higher incomes and yields than those practising chemical-intensive agriculture.