1. Munson, R.D.Potassium in Agriculture; American Society of Agronomy, Crop Science Society of America, Soil Science Society of America: Madison, 1985; 1223.
2. Principles of Plant Nutrition
3. Marschner, H.Mineral Nutrition of Higher Plants. 2nd Ed.; Academic Press: London, 1995; 889.
4. Molecular insights into the structure and function of plant K+ transport mechanisms