Under the pressure of increasing population and other competing land use demands, long fallow periods are no longer possible in densely populated areas. In some areas of the tropics, traditional farmers respond to this problem by selectively retaining multipurpose woody species, which they consider useful and also more effective in biologically enriching the fallow in a shorter time. It is also used to mean the planting of perennial legumes on a fallow land to quicken/shorten the restoration period. Here the area to be fallowed is deliberately sown to legumes (biennial or perennial), which assists in the fertilization of the soil; thus shortening the fallow period. It can also be referred to as intensive fallow.
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