Columbia subject headings:
Agricultural ecology.
Agrobiodiversity conservation.
Biodiversity conservation.
Land capability for agriculture.
Soil conservation.
Sustainable agriculture.
Harvard subject headings:
Agricultural ecology.
Agrobiodiversity conservation.
Biodiversity conservation.
Land capability for agriculture.
Soil conservation.
Sustainable agriculture.
Princeton subject headings:
Agricultural ecology.
Agrobiodiversity conservation.
Biodiversity conservation.
Land capability for agriculture.
Soil conservation.
Sustainable agriculture.