Water and soil - plant relations. General aspects of nutrition. Space, organic acids, and source of nutrients. Absorption. Factors affecting absorption. Permeability and membrane. Translocation. Role of macronutrients in higher plants. Roles of elements in lower plants. Hydroponics. Deficiency symptoms. Occurrence, prevention, and alleviation of deficiencies. Excesses of salts. Applied aspects of salinity. Theoris of limiting factors. Specific limiting factors
