摘要：This paper analyzes the influence of social capital on the farmers' perception of the soil erosion problem and the level of investments in soil conservation in marginal areas of Kenya. It uses data from a survey of 321 households in Machakos and Taita-Taveta Districts. A Heckman's two-step model is applied to assess the influence of social capital on investments in soil conservation by farmers. Results show that the education level of the household head, slope of farmers' fields, proportion of off-farm income, and the status of soil erosion are significant determinants of the likelihood of farmers recognizing soil erosion as an important problem. Household size, slope, land tenure security, membership diversity, age of household head, farm size per capita and membership in groups influence investments in soil control measures such as terraces. The effects, however, are location-specific. The policy challenge is to establish and strengthen social capital elements that have a strong influence on communities undertaking soil conservation measures to promote sustainable agriculture, and improve land tenure security.
