机译:土地退化,政府补贴与小农保护决策:以中国黄土高原为例
CollegeofResourceandEnvironmentalSciences,GraduateSchoolofChineseAcademyofSciences,Beij'ing100049,China//GraduateSchoolofLifeandEnvironmentalSciences,UniversityofTsukuba,Japan;
DepartmentofRuralEconomy,UniversityofAlberta,Canada;