The excessive accumulation of salt in the root zone of plants is a problem which is widespread in area, increasing in magnitude, and limiting in its effect upon productivity. Accumulation of salt in the rhizosphere has an effect upon moisture availability for plant use, the nutritional balance of the essential elements, and causes a reduction in plant growth with toxicity often resulting. When plants grow on substrates high in salt, the salt content of the plant also increases. This uptake of salt often results in changes in the morphology of the plant. Accumulation of salt within the plant cells interferes with the protoplasmic activity.