Monoculture or polyculture?

Sabirin and Hamdan North Sumatra is a province in the Indonesian archipelago. Its tropical rain forest has a rich natural biodiversity to which traditional swidden agriculture has contributed a rich agro-biodiversity. However, this richness is steadily being replaced...

The Ikalahan: towards sustainable forest use

Delbert Rice The Ikalahan (Kalanguya) inhabit the upper, forested regions of the Cordillera and Caraballo Mountains of Northern Luzon in the Philippines. Traditionally they are shifting cultivators, primarily focused on the staple food crop obi (sweet potato Ipomoea...