Front Cover; Advances in Agronomy, Volume 68; Copyright Page; Contents; Contributors; Preface; Chapter 1. A Lifetime Perspective on the Chemistry of Soil Organic Matter; I. Introduction; II. Soil Organic Matter (SOM); III. Humic Substances: Analytical Characteristics; IV. Chemical Structure of Humic Substances; V. Nitrogen-, Phosphorus-, and Sulfur-Containing Components of SOM; VI. Colloid Chemical Characteristics of Humic Acids and Fulvic Acids; VII. Water Retention by Humic Substances; VIII. Reactions of Humic Substances with Metals and Minerals
Chapter 3. Advances in Chloride Nutrition of PlantsI. Introduction; II. Behavior of Chloride in Soil; III. Chloride in Plants; IV. Chloride in Crops; V. Chloride Management in Fertilization and Irrigation; VI. Summary; References; Chapter 4. Oxisols; I. Introduction; II. Historical Background; III. Geography of Oxisols; IV. Definition and Kinds of Oxisols; V. Processes and Formation of Oxisols; VI. Soil-Landscape Interactions; VII. Features and Processes; VIII. Ecosystem Management; IX. Summary; References
Chapter 5. Crop Residues and Management Practices: Effects on Soil Quality, Soil Nitrogen Dynamics, Crop Yield, and Nitrogen RecoveryI. Introduction; II. Crop Residues and Their Uses; III. Decomposition of Crop Residues; IV. Crop Residues and Management Practices; V. Soil Nitrogen Dynamics and Crop Nitrogen Recovery; VI. Nitrogen Benefits to Subsequent Crops; VII. Conclusions; References; Index
IX. Interactions of Pesticides and Herbicides with Humic SubstancesX. Functions and Uses of Humic Substances; XI. Conclusions and Outlook for the Future; XII. Personal Encounters with Outstanding Scientists; References; Chapter 2. Reproductive Development in Grain Crops During Drought; I. Introduction; II. Sensitivity to Drought at Various Reproductive Stages; III. Nature of Injury; IV. Water Relations of Reproductive Tissues and Their Influence on Yield; V. Physiological and Metabolic Bases for Reproductive Failure under Drought; VI. Concluding Remarks; References
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Advances in Agronomy continues to be recognized as a leading reference and a first-rate source of the latest and best research in agronomy. As always, the topics covered are varied and exemplary of the panoply of subject matter dealt with by this long-running serial. Volume 68 contains five outstanding and contemporary reviews on topics that deal with soil chemistry, plant physiology, plant nutrition, and soil and crop management. Chapter 1 by Morris Schnitzer summarizes the past and present knowledge of the chemistry of soil organic matter. Chapter 2, written by H.S. Saini and M.E. Westgate, i.