“…Previous studies found that, in addition to biophysical conditions such as longitude, latitude and annual average evaporation (Gobin et al, 2000;Miller et al, 2010;Stringer et al, 2009;Wang et al, 2010;Yang, 2009;Yang et al, 2013;Yang and Wu, 2012), the role of science in desertification control could be influenced by (1) the types of scientific method of desertification control and their relationships and accompanying extension services (Watson et al, 2008;Yang, 2009;Yang et al, 2013), (2) the types of social participant and their interactions in desertification control programs (Beunen and Opdam, 2011;Chittenden, 2011;Nelson et al, 2008;Pellant et al, 2004;Reynolds et al, 2007;Seely, 1998;Seely and Moser, 2004;Thomas and Twyman, 2004;van Rooyen, 1998;Wang et al, 2010;Watson et al, 2008;Yang, 2009Yang, , 2012Yang et al, , 2013 and (3) the types of law, regulation and rule of desertification control and their relationships Barrera-Bassols et al, 2006;Garcia and Charles, 2008;Lidskog and Sundqvist, 2002;Thomas, 1997;Yang, 2009;Yang et al, , 2013Wu, 2010, 2012). In particular, the application of different methods of desertification control and the participants in desertification control strongly influenced the types of institutional change in desertification control, while all three aforementioned aspects affected the mechanisms of institutional change (Yang, 2009;Yang et al, 2013;Wu, 2010, 2012).…”