Dependency on forest and tree products for food security. A pilot study in Yen Huong commune, Ham Yen district, Tuyen Quang province, North Vietnam

cooperativas cooperative activities cultivo migratorio developing countries food security forest land forest products hogares hortalizas households legume productos forestales produit forestier pueblos rapid rural appraisal seguridad alimentaria shifting cultivation terrain forestier tierras forestales vegetables viet nam vietnam village villages