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. Language: English