Published online by Cambridge University Press: 24 August 2009
Recently, intensification of both rain-fed and dry-season irrigated agriculture has necessitated widespread use of pesticides in the extensive sub-humid zones of Nigeria. In this region is located over 80% of Nigeria's existing surface area of reservoirs in the country. The majority of these reservoirs were built artificially for a multiplicity of uses among which fisheries and Nature conservation ranked very high.—