For example, conservation agriculture, which aims to reduce or eliminate the need for damaging and labor-intensive interventions like mechanical soil tillage, can increase yields while protecting vulnerable areas from erosion and improving soil fertility. In Zambia, research conducted by local governments, in collaboration with the anti-poverty charity Concern Worldwide, found that new hybrid seeds produced roughly four to five tons of maize per hectare, compared to Africa’s average of one ton per hectare.
比如，保护性农业——旨在降低甚至消除破坏性和劳动密集性干涉，比如机械化耕作——可以在增加产量的同时保护脆弱土地免遭流失，并改善土壤肥力。在赞比亚，当地政府与私人扶贫慈善组织关爱世界（Concern Worldwide）一起开发了新的杂交种子，可以使每公顷玉米产量达到四五吨，而非洲的平均公顷产量只有一吨。