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    <subfield code="a">Part I Nutritional Physiology -- Ion Uptake Mechanisms of Individual Cells and Roots: Short Distance , Long-Distance Transport in the Xylem and Phloem and its Regulation , Uptake and Release of Mineral Elements by Leaves and Other Aerial Plant Parts , Yield and the Source-Sink Relationships , Mineral Nutrition and Yield Response , Nitrogen Fixation , Functions of Mineral Nutrients: Micronutrients , Beneficial Mineral Elements , Relationships between Mineral Nutrition and Plant Diseases and Pests , Diagnosis of Deficiency and Toxicity of Mineral Nutrients -- Part II Plant-soil Rrelatioships -- Nutrient Availability in Soils , Effect of Internal and External Factors on Root Growth and Development , The Soil-Root Interface (Rhizosphere) in Relation to Mineral Nutrition , Adaptation of Plants to Adverse Chemical Soil Conditions , </subfield>
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