Front Cover; Advances in Agronomy, Volume 23; Copyright Page; Contents; Contributors to Volume 23; Preface; Errata for Volume 22; CHAPTER 1. PLANT GERM PLASM NOW AND FOR TOMORROW; I. Introduction; II. Germ Plasm Definitions; III. Our Needs for Germ Plasm; IV. Where Germ Plasm Comes from; V. Collecting and Assembling Germ Plasm; VI. Evaluation, Increase, and Maintenance of Germ Plasm; VII. How Germ Plasm Is Used; VIII. Germ Plasm Collections; IX. Programs for the Future; References; CHAPTER 2. THE RELATION BETWEEN GEOMORPHOLOGY AND SOIL MORPHOLOGY AND GENESIS; I. Introduction
II. Evolution of Soil-Geomorphic ConceptsIII. Criteria Used in Geomorphic Work; IV. Examples of Soil-Geomorphic Relations; V. Summary; References; CHAPTER 3. FACTORS AFFECTING ROOT EXUDATION; I. Introduction; II. History; III. Sources of Exudate and Pattern of Root Exudation; IV. Interactions of Organic Nitrogen Sources and Exudation; V. Effects on Carbon and Nitrogen Balance in Plants; VI. Foliarly Applied Compounds and Root Exudation; VII. Root Exudation-Mineral Nutrient-Microbial Interactions; VIII. Effects of Environment on Root Exudation; IX. Summary; References
CHAPTER 4. NATURE, EXTENT, AND VARIATION OF PLANT RESPONSE TO AIR POLLUTANTSI. Introduction; II. Nature of Plant Response; III. Extent of Response; IV. Variation in Response as Related to Other Factors; V. Discussion; VI. Summary; References; CHAPTER 5. BEHAVIOR OF PESTICIDES IN SOILS; I. Introduction; II. Processes Affecting Pesticides in Soils; III. Effect of Pesticides on Soil Community; IV. Implications; V. Summary; References; CHAPTER 6. PHYSIOLOGY OF THE RICE PLANT; I. Introduction; II. Static Approach: Analytical Studies of the Growth of the Rice Plant
III. Dynamic Approach: Fundamental Research for Higher YieldIV. Conclusion; References; CHAPTER 7. PHOTOSYNTHESIS AND CROP PRODUCTION; I. Introduction; II. Yield and Net Photosynthesis; III. Factors Limiting Photosynthesis; IV. Breeding for Photosynthetic Efficiency; V. Selecting for Low Г Traits in High Г Species; VI. Selecting for Photosynthetic Rates within Species; VII. Breeding for Plant Type; VIII. Managing Photosynthesis; References; CHAPTER 8. NITRIFICATION RETARDERS AND SLOW-RELEASE NITROGEN FERTILIZERS; I. Introduction
II. Nitrification-Retarding Properties of Agricultural ChemicalsIII. Nitrification Retarders; IV. Slow-Release Nitrogen Fertilizers; V. Coated Fertilizers; VI. Concluding Remarks; References; Author Index; Subject Index