ABSTRACT
Plant productivity is limited on an estimated one third of the irrigated land in the world or approximately 4 × 107 ha by soluble salt accumulations in the soil, often referred to as soil salinity or salinity. As irrigated agriculture expands, more salinity problems will develop because there are millions of hectares of potentially irrigable land that could become saline. Every year new salinity problem areas develop and are identified. Salinity is the most important problem facing irrigated agriculture, and solving salinity problems is one of the greatest challenges to agricultural scientists.
