L’Évaluation économique de l'investissement dans la conservation des sols: Le cas des aménagements antiérosifs dans le bassin versant du lac Lagdo au Cameroun

This article presents an analysis of the economic impact of erosion control facilities on farm operations in the watershed of Lake Lagdo in Cameroon. Over the past several decades, erosion control facilities, which are erosion control techniques, have been introduced in Cameroon. No assessment of the impacts of these on farm operations had yet been made. Drawing on data from a survey carried out in 2007 and 2008 and a switching regression model, the study concentrates on the effectiveness of the production factors of parcels of land with and without erosion control facilities. The comparison of the average crop yields of the operations in our sample that either adopted or did not adopt such facilities shows a significant difference, representing up to 10% of the value of the farm production. Proof of a positive selection bias is also found, indicating that the farms with above‐average crop yields are more likely to adopt erosion control facilities. Such facilities on the parcels of land also provide an advantage in terms of increasing the productivity of inputs. The analytical approach developed and the positive conclusion of the selection bias can be pertinent to assessing other soil conservation technologies promoted in the area.