Rates of Change of Soil Structure Under Different Cropping Systems. - I. Introduction. - II. Soil Structure. - III. Processes Responsible for Changing Soil Structure. - IV. Managing Soil Structure with Cropping Systems. - V. Quantifying the Influence of Cropping Systems on the Rates of Change of Soil Structure. - VI. Summary. - Acknowledgments. - References. - Crop Responses to Azospirillum Inoculation. - I. Introduction. - II. Interactions of Azospirillum with Roots. - III. Yield Responses to Azospirillum Inoculation. - IV. Possible Reasons for Plant Response to Azospirillum. - V. Importance of Strain Selection. - VI. Conclusions. - References. - Application of 57Fe Mössbauer Spectroscopy to Problems in Clay Mineralogy and Soil Science: Possibilities and Limitations. - I. Introduction. - II. Physical Background and Instrumentation. - III. Paramagnetic and Diamagnetic Minerals. - IV. Magnetically Ordered Minerals. - V. Complex Natural Assemblages: Soils and Sediments. - VI. Summary and Suggested Applications. - Acknowledgments. - References. - High-Resolution Transmission Electron Microscopy (HRTEM) in the Study of Clays and Soils. - I. Introduction. - II. Transmission Electron Microscopy versus X-Ray Diffraction. - III. Principles of TEM. - IV. Sample Preparation. - V. Characterization. - VI. Conclusions. - References. - Bare-Soil Evaporation in Relation to Tillage. - I. Introduction. - II. Process of Evaporation. - III. Factors Affecting Bare-Soil Evaporation. - IV. Dynamics of Evaporation from Tilled Soil. - V. Evaporation Reduction with Tillage. - VI. Summary. - References. Language: English