Advances in Soil Science

Ionic Factors Affecting Aluminum Transformations and the Impact on Soil and Environmental Sciences.- I. Introduction.- II. Forms and Distribution of Aluminum in Soils and Associated Environments.- III. Fundamental Aqueous Chemistry of Aluminum.- IV. Influence of Clay Minerals on Aluminum Transformations.- V. Influence of Inorganic Ligands on Aluminum Transformations.- VI. Influence of Organic Acids on Aluminum Transformations.- VII. Impact of Aluminum Transformations on Soil and Environmental Sciences.- VIII. Summary and Conclusions.- Acknowledgments.- References.- Improving and Sustaining Productivity in Dryland Regions of Developing Countries.- I. Introduction.- II. Identifying and Alleviating Constraints to Productivity.- III. Conclusions.- Acknowledgments.- References.- A Conceptual Model of Changes in Soil Structure Under Different Cropping Systems.- I. Introduction.- II. The Conceptual Model.- III. General Discussion.- IV. Summary.- Acknowledgments.- References.- Distribution, Properties, and Management of Vertisols of India.- I. Introduction.- II. Physical Properties.- III. Chemical Properties.- IV. Mineralogical Properties.- V. Technology to Alleviate Adverse Soil Physical Properties.- VI. Nitrogen.- VII. Phosphorus.- VIII. Potassium.- IX. Micronutrients.- X. Perspectives and Research Needs.- XI. Summary.- Acknowledgments.- References.