Complex sentence: Soil salinity control relates to controlling the problem of soil salinity and reclaiming salinized agriculturali smellsoil degradation by salination and reclaim already salty (saline) soils.
Split into simpler sentences: Soil salinity control relates to controlling the problem of soil salinity and reclaiming salinized agricultural land. The aim of soil salinity control is to prevent soil degradation by salination and reclaim already salty (saline) soils.