Advances in Soil Science

Vesicular-Arbuscular Mycorrhizae as Modifiers of Soil Fertility.- I. Introduction.- II. Mycorrhizae.- III. Development of Vesicular-Arbuscular Mycorrhizae.- IV. Root-Soil Interactions.- V. Vesicular-Arbuscular Mycorrhizae and Acquisition of Phospate by Plants.- VI. Vesicular-Arbuscular Mycorrhizae and Nitrogen Nutrition.- VII. Vesicular-Arbuscular Mycorrhizae and the Acquisition of Other Nutrients.- VIII. Vesicular-Arbuscular Mycorrhizae and Plant Growth under Stress Situations.- IX. Managing Vesicular-Arbuscular Mycorrhizae under Natural Conditions.- X. Conclusions.- References.- Argillic Horizons in Modern Loess Soils in an Ustic Soil Moisture Regime: Comparative Studies in Forest-Steppe and Steppe Areas from Eastern Europe and the United States.- I. Introduction.- II. Geographic Comparison of the Forest-Steppe and Steppe Regions of Eastern Europe and the United States.- III. Results.- IV. Discussion.- V. Summary and Conclusions.- Acknowledgments.- References.- Myths and Scientific Realities of Agroforestry as a Strategy for Sustainable Management for Soils in the Tropics.- I. Introduction.- II. Farming Systems Prevalent in the Tropical Rainforest Zone.- III. Need for Introducing Permanently Sustainable Farming Systems.- IV. Alley Cropping.- V. Transfer of Alley-Cropping Technologies.- VI. Research Priorities.- VII. Modus Operandi.- VIII. Linking Training with Research.- IX. Potential of Agroforestry: Myth or Reality.- References.- Land Evaluation: From Intuition to Quantification.- I. Introduction.- II. Historical Perspective.- III. Major Systems and Trends since 1950.- IV. The FAO Framework as a Standard in Land Evaluation.- V. Land Evaluation in Practice: Selected Case Studies.- VI. Yield Estimates and Productivity Ratings.- VII. Use of Models in Regional Land Evaluations.- VIII. Application of Land Evaluation in Land Use Planning.- IX. Conclusions.- References.- Crop Residue Management.- I. Introduction.- II. Grain Yield.- III. Soil Chemical Properties.- IV.