Advances in Soil Science

Developments in Soil Erosion and Deposition Models.- I. Introduction.- II. Hydrologic Models.- III. Controlled Research on Soil Erosion and Deposition Processes.- IV. Conceptualization of Erosion/Deposition Processes.- V. Erosion/Deposition Model of Rose et al..- VI. Application of Model of Rose et al..- VII. Comparison of the Modeling Approach of Foster et al. and Rose et al. for Overland Flow.- VIII. Sediment Deposition and Load-Bed Relationships.- IX. Simplified Theory of Rose et al. with Applications.- X. Some Brief Implications for Field Conservation Research and Conservation Planning.- Acknowledgments.- References.- Dynamics and Availability of Major Nutrients in Soils.- I. Introduction.- II. Factors and Processes of Plant Nutrient Availability.- III. Nitrogen.- IV. Phosphorus.- V. Potassium.- VI. Concluding Remarks.- References.- Microorganisms and Soil Aggregate Stability.- I. Introduction.- II. Why Is Stable Aggregation Necessary?.- III. How Are Microorganisms Involved?.- IV. What Are the Mechanisms Involved?.- V. Applications.- VI. Conclusions.- References.- The Distinctive Properties of Andosols.- I. Introduction.- II. Formation of Andosols.- III. Humus and Its Accumulation.- IV. Clay Minerals Particular to Andosols.- V. Formation and Transformation of Clay Minerals.- VI. Electric Charge Characteristics of Andosols.- VII. Cation Exchange in Andosols.- VIII. Reaction with Phosphates.- IX. Physical and Mechanical Properties.- X. Conclusions.- References.