One approach is to draw on self-selection. An example for this method is the Projet d'irrigation et de gestion de I'eau a petite echelle (PIGEPE) project in Burkina Faso, which provides micro-irrigation kits only attractive to farmers with small landholdings. Only farmers who are part of the target group will acquire these kits. For example, participation in the programmes of the Chilean public Instituto de Desarrollo Agropecuario (INDAP) is open only to small family farmers who fulfil the following economic criteria: their agricultural assets may not exceed a value of approximately US$140 000, the area under their cultivation must be below a location-specific limit, and agriculture must be the households' main source of income.