QUARTERMASTER RESEARCH AND ENGINEERING COMMAND NATICK MA NATICK United States
This report defines and briefly describes the wet-tropical areas of the world. They lie between 25n and 25S latitudes, and cover about15 percent of the worlds land surface. This area was determined by using as indices to world distribution 16 authoritative maps of climate, vegetation, and soil. Core areas and transitional areas were distinguished the core areas were studied in more detail, since transitional areas are wet-tropical for only part of the year.