85 {
86 float fertility = 0.8;
87 if ( surface_type == "hlina" || surface_type == "CRGrass1" || surface_type == "CRGrass2" || surface_type == "CRForest1" || surface_type == "CRForest2" || surface_type == "CRGrit1" )
88 {
89 fertility = 0.8;
90 }
91
92 return fertility;
93 }