http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Trình bày kỹ thuật trồng, chăm sóc, phòng trị bệnh cho các giống khoai: khoai lang, sắn (khoai mì), khoai môn, khoai tây.
Field crops,Sweet potatoes,Potatoes,Kỹ thuật trồng khoai