6 Magnesium The word ‘magnesium’ is derived from ‘magnesia’ for the Magnesia district in Greece where talc (magnesium stone) was first mined (1,2). However, there are other cities that are also named after the magnesium deposits in local regions. | 6 14 2006 7 04 AM Page 145 6 Magnesium Donald J. Merhaut University of California Riverside California CONTENTS Historical Determination of Function in Metabolic Fruit Yield and Diagnosis of Magnesium Status in Symptoms of Deficiency and Symptoms of Deficiency .148 Symptoms of Excess .149 Environmental Causes of Deficiency Nutrient Imbalances and Symptoms of Deficiency .150 Potassium and Calcium and Magnesium .151 Nitrogen and Sodium and Iron and Magnesium .152 Manganese and Zinc and Phosphorus and Magnesium .153 Copper and Chloride and Aluminum and Phenotypic Differences in Genotypic Differences in Concentrations of Magnesium in Magnesium Distribution in Seasonal Physiological Aspects of Magnesium Allocation .156 Critical Concentrations .157 Tissue Magnesium Concentration Associations with Crop Yields .157 Tabulated Data of Concentrations by Crops .157 Assessment of Magnesium in Soils .165 Forms of Magnesium in Soils .165 Sodium Absorption 145 6 14 2006 7 04 AM Page 146 146 Handbook of Plant Nutrition Soil Tabulated Data on Magnesium Contents in Soil Fertilizers for Kinds of Effects of Fertilizers on Plant Growth .170 Application of Fertilizers .172 HISTORICAL INFORMATION Determination of Essentiality The word magnesium is derived from .
