There are two different systems of crop farming in the Okavango region: dryland farming and flood recession or Molapo farming. A land use assessment on the basis of satellite images carried out by the University of Botswana found that of 48,900 hectares cleared for cultivation in Ngamiland, 75% consist of dryland fields and 25% of fields in temporarily inundated floodplains. While dryland crops depend entirely on rainfall, flood recession farming makes use of fields -known as molapo, plural melapo - that are located close to or in the floodplain or river channel where soils are moistened by seasonal flooding or the draining of water into low-lying ground, supplemented by rainfall. During the recession of the floods the fields gradually dry up and strips parallel to the remaining water can be successively planted as the water recedes.