The Republic of the Fiji Islands is an archipelago in the South Pacific Ocean. The total number of islands in Fiji is 332. The geographic coordinates of the location of Fiji are 18°00′S 179°00′E. The total area of ​​Fiji is 18,270 km². Fiji is made up of many small islands of which Viti Levu and Vanua Levu are the largest. Topographically, Fiji's topography is divided into three broad classes: plains and valleys; low mountains, hills and high mountains. The reliefs are either sedimentary - coastal or fluvial, erosive - fluvial erosion, mass movements or volcanic. The distribution of soil types can be produced from a geographic information system (GIS) based at the Koronivia research station. Sixty-five percent of the soils developed on steep slopes (more than 21°), 20% on slightly rolling and undulating terrain (4-21°) and 15% on flat terrain (less than 4°) ( Leslie 1997). The most fertile soils are found in the floodplains of the Sigatoka, Rewa, Nadi, Ba, Navua and Labasa rivers and are generally derived from basic volcanic materials. Some soil types are “nigrescent – ​​dark topsoil” and ferru...