The rainforests that the Yanomamo inhabit include both riverine lowland and tropical highland. Both habitat subtypes contain huge vine-covered trees and are relatively free of underbrush. Subsistence The top soil of these tropical rainforests is an acidic and nutrient poor type of soil called laterite. To deal with these hazards, the Yanomamo practice shifting cultivation and other soil conservation methods. The Yanomamo cultivate five major varieties of plantains ranging from red and purple varieties to a pale yellow type.
Tubers are the second most important crop.
Starchy tubers such as New World yams, ocumo, shibujurimo, sweet potatoes, and sweet manioc are the most common varieties. This cycle begins with the selection of a site for a new garden plot. In order to be selected, a site must be ishabena, which means good for growing plantains. In order to be ishabena, the site must be covered with trees that are full height. When the site is cleared, the large trees are felled, the underbrush is uprooted, and the entire clearing is burnt.