Advances in Soil Science

Soil Management for Optimized Productivity Under Rainfed Conditions in the Semi-Arid Tropics.- I. Introduction.- II. Soils of the Semi-Arid Tropics.- III. Major Characteristics of SAT Vertisols and Alfisols.- IV. Dryland Management Options for SAT Vertisols and Alfisols.- V. Conclusions.- References.- Soil Profile Modification for Increasing Crop Production.- I. Introduction.- II. Literature Review and Discussion.- III. Summary.- References.- The Effect of Exchangeable Sodium and Electrolyte Concentration on Crust Formation.- I. Introduction.- II. Crust Properties as Determined by the Infiltration Rate (IR).- III. Effect of ESP and Electrolyte Concentration on the Structure of the Soil Crust.- IV. Effect of Soil Sodicity on Crust Formation (and Rain Infiltration)-Field Studies.- V. Summary.- References.- Ammonia Volatilization from Ammonium or Ammonium-Forming Nitrogen Fertilizers.- I. Introduction.- II. Methods for Estimating NH3 Volatilization.- III. Chemistry of NH3 Volatilization.- IV. Magnitude of NH3 Losses.- V. Chemical and Physical Parameters That Control Absolute NH3 Losses.- VI. Ammonia Loss from Flooded Systems.- VII. Volatilization Loss of Nitrogen Following Forest Fertilization.- VIII. Ammonia Transfer Cycle.- IX. Conclusion.- References.- The Effect of Pedogenic Environments on Iron Oxide Minerals.- I. Introduction.- II. Pedoenvironments and Fe(III) Oxide Minerals.- III. Aluminum Substitution.- IV. Pedoenvironments and Crystal Quality.- V. Iron Oxide Minerals and Soil Classification.- References.- Soil Testing.- I. Introduction.- II. Research Required as a Basis for Soil Testing.- III. Taking the Sample.- IV. Laboratory Procedures.- V. Soil Test Calibration and Interpretation.- VI. Rating Soil-Test Values and Use of a Fertility Inde.- VII. Making Limeand Fertilizer Recommendations from Soil Tests.- References.- Boron in Water, Soils, and Plants.- I. Introduction.- II. Boron Chemistry in Aqueous Media.- III. Boron-Soil Interaction.- IV. Boron in