Reinvesting in African Small-Holder Agriculture : The Role of Tree Crops in Sustainable Farming Systems

agribusiness agricultural development agricultural growth agricultural production agriculture beverage crops biodiversity biotechnology breeding cash crops cocoa beans coconuts coffee coffee beans commodities crop production cropping systems debt decentralization economic competition economic growth employment extension farm income farmer farmers farming farming systems farms food crops gender gum arabic harvesting hunger land use livelihoods livestock market prices marketing mixed farming natural resources oil palm perennial crops plantations poverty reduction private sector produce production systems productivity public-private partnerships rice risk management rubber crops rural development rural poverty small farms sustainable development tea tea industry transaction costs tree crops trees wages