what is salt leaching
Salt Leaching. Leaching is the transport of salts out of the root zone using irrigation water. The proportion of the irrigation water used specifically for this purpose is the leaching fraction (LF).The leaching fraction (LF) is water beyond that required for tree growth and crop developmentâthat is, for evapotranspiration (ET).he proportion of the irrigation water used specifically for this purpose is the leaching fraction (LF). The leaching fraction (LF) is water beyond that required for tree growth and crop developmentâthat is, for evapotranspiration (ET).