Agroforestry—the deliberate integration of trees with crops and livestock on the same land—is one of the few agricultural strategies that simultaneously addresses carbon sequestration, biodiversity conservation, and smallholder livelihoods. Unlike monoculture approaches that optimize for a single output, agroforestry produces multiple ecosystem services from the same parcel, making it particularly relevant for tropical smallholder systems where land is scarce and farmers cannot afford to set aside land exclusively for conservation.
Demie, Negash, and Asrat (2024) quantify carbon stocks across different agroforestry practices in Central Ethiopia, finding substantial variation depending on tree species composition, management intensity, and socioecological context. Their measurements show that well-managed agroforestry systems can store significant amounts of carbon per hectare in aboveground and belowground biomass—levels that approach those of secondary forests while maintaining agricultural production. Critically, the study finds that carbon stock estimates vary significantly depending on which allometric models are used, a methodological point with direct policy implications: carbon credit schemes that use inappropriate models may systematically over- or under-credit agroforestry systems, affecting both farmer compensation and the integrity of carbon accounting.
Wiryono, Kristiansen, and Bruyn (2023) examine traditional home garden agroforestry in Bengkulu, Indonesia, documenting the simultaneous provision of food security, biodiversity conservation, and carbon storage. Their surveys reveal home gardens with species richness ranging from 18 to 36 plant species per garden (57 species total across sites)—a diversity level that provides meaningful habitat functions within the same landscape as larger forests. These gardens provide food, medicine, construction materials, and income while maintaining habitat connectivity for birds, insects, and small mammals. The carbon storage function, while lower per hectare than commercial plantation agroforestry, is significant in aggregate because home gardens cover substantial cumulative area across the Indonesian archipelago. The study underscores that traditional knowledge systems have been practicing multi-functional land management for centuries before the term "ecosystem services" was coined.
Sari (2025) synthesizes the broader evidence linking agroforestry to climate action, reviewing studies from tropical Asia, Africa, and Latin America. The narrative review confirms that agroforestry contributes to both mitigation (carbon sequestration) and adaptation (diversified income sources, microclimate buffering, soil moisture retention) but identifies a persistent implementation gap. Despite strong evidence and favorable policy rhetoric, agroforestry adoption rates remain lower than projections because of insecure land tenure, upfront establishment costs, delayed returns compared to annual crops, and extension services that remain oriented toward monoculture intensification. The review argues that closing this gap requires not just better science but better financing—particularly mechanisms that compensate farmers for the ecosystem services their agroforestry systems provide to the broader public.
The synthesis points to a paradox: agroforestry is among the most evidence-supported climate and biodiversity interventions available, yet it remains chronically underfunded and underscaled. The reason is structural—the benefits are diffuse (carbon, biodiversity, watershed protection) while the costs are concentrated (the farmer who plants the trees), and no adequate mechanism exists to transfer value from beneficiaries to providers.