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Organic farming areas are often fragmented and lack sufficient barriers to prevent chemical contamination from neighbouring conventional farms.

Bac giangTinh bac giangRepublic ofBac ninhTinh bac ninhLuc trucThanh hómHan iUnited statesSouth koreaViet namLe ba thanhDao thanh vanVietnam organic agriculture associationNational agricultural extension centreAgricultural extension forum