ABSTRACT
Sodicity is a latent problem in many salt-affected soils where deleterious effects on soil properties are evident only when salts are leached below a threshold level. While soil salinity reduces plant growth, directly affecting physiological functions through osmotic and toxicity effects on plants, sodicity causes deterioration of soil physical properties indirectly affecting plant growth and survival. Sodic soils are subjected to severe structural degradation and exhibit poor soil-water and soil-air relationships; these properties adversely affect root growth, thereby restricting plant production and making it difficult to work in soils whether they are wet or dry.
