For example, misuse of pesticides and fertilisers may have implications for the crops of other farmers nearby. Through randomized control trials in five counties in Hebei and Anhui provinces, Burger et al. ( They observe significant heterogeneity in the quality of the programmes, suggesting that training and performance-based incentives for facilitators will be important for any broader roll-out of farmer field schools. Food safety risks have arisen numerous times over the past decade, such as when daces of carcinogenic drugs administered by farmers were found in turbot in Beijing and Shanghai (Gale and Buzby, 2009).