Cover; Title Page; Copyright Page; Contents; Contributors; Preface; Chapter 1: Soil Redox Potential: Importance, Field Measurements, and Observations; I. Introduction; A. Redox and Wetland Issues; B. Relevance of Redox Measurements in Soil Science; II. Potentiometric Measuring Techniques; A. Reference Cell; B. Working Redox Electrodes; C. Problems of Soil Redox Measurements; D. Testing Electrodes Prior to Installation; III. Data Interpretation; A. Correction of Field Data; B. Variability; C. Pooling of Long-Term Data Sets; IV. Alternative Methods for Assessing Reduction in the Field.

A. Iron-Coated (IRIS) TubesB. Dyes; C. Zero Valence Iron Rods; V. Field Installation and Procedures for Redox Potential Measurements; A. Number of Electrodes to Install; B. Installing Pt Electrodes; C. Reading the Electrodes; D. Common Field Problems; E. Field pH Measurements; F. Interpreting Redox Potential; VI. Summary; References; Chapter 2: Increasing Rice Production in Sub-Saharan Africa: Challenges and Opportunities; I. Introduction; II. Rice Demand and Supply; III. Wetlands: The Potential Resource for Rice Production in SSA; A. Definition, Area and Distribution of Wetlands.

B. Types and Characteristics of WetlandsIV. Rice Soil Resources; A. Dryland Soils and Their Characteristics; B. Wetland Soils and Their Characteristics; V. Agroclimatic Zones and Rice Ecosystems; A. Dryland Rice Ecosystems; B. Wetland Rice Ecosystems; VI. Rice Production Constraints in SSA; A. Physical, Biological, and Management Constraints; B. Human Resource Constraints; C. Socioeconomic and Policy Constraints; VII. Rice Research and Technology Development During the Past 20 Years; A. Rice Germplasm, Breeding, and Variety Development; B. Rice Seed Production and Distribution Services.

C. Crop EstablishmentD. Nutrient Management; E. Water Management for Rainfed and Irrigated Areas; F. Weeds, Insect Pests, and Diseases and Their Management; G. Grain Quality Management: From Breeding to Milling; H. Diversification of Rice Farming Systems; I. ICM for Rice; VIII. Rice Intensification Issues and Thoughts for the Future; A. Rice Intensification in Relation to Vector-Borne Human Diseases; B. Environmental Issues Related to Rice Intensification in SSA; C. Preparing for the Impact of Climate Change; D. Technology Delivery and Deployment Issues.

E. Policy Support for Rice Intensification in SSAIX. Conclusions: Challenges to and Opportunities for Enhancing Rice Production in SSA; Acknowledgments; References; Chapter 3: Phosphate Reaction Dynamics in Soils and Soil Components: A Multiscale Approach; I. Introduction; II. P Chemistry; III. Phosphate Adsorption on Soil Components; A. Phosphate Adsorption on Soils (Empirical Approaches); B. Phosphate Retention as Affected by Physicochemical Properties of Soils; C. pH Effects on Phosphate Adsorption on Variable Charge Minerals; D. Phosphate Adsorption on Metal Oxides.