Resulting from an underwater volcano, Indonesia is very mountainous. Due to being on the equator, it's also largely tropical rain forest. Neither of two is particularly good for agriculture, but the main economic activity remains commercial farming, and Indonesia has many people to feed. To deal with these setbacks, Indonesians expand their farmland into the rain forests, and terrace up the mountains. The tropical wet climate helps, however, providing rain and erasing the need for irrigation. These methods work for now, but there's no telling how long they will.
Citations: Greenvital.net,
