1 online resource (xi, 340 pages)

ADVANCES IN AGRONOMY VOLUME 21

Includes bibliographical references and indexes

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Front Cover; Advances in Agronomy, Volume 21; Copyright Page; Contents; Contributors to Volume 21; Preface; CHAPTER 1. THE NUTRITIVE VALUE OF FORAGE CROPS; I. Introduction; II. The Components of Nutritive Value; III. The Digestibility of Forage Crops; IV. The Digestibility of Different Forage Species; V. The Voluntary Intake of Forages; VI. The Efficiency of Utilization of Digested Nutrients; VII. The Relationship between Forage Quality and Forage Yield; VIII. Forage Breeding for Improved Nutritive Value; IX. The Effects of Processing on the Components of Forage Nutritive Value

X. The Nutritive Value of Grazed ForageReferences; CHAPTER 2. POTENTIALLY ARABLE SOILS OF THE WORLD AND CRITICAL MEASURES FOR THEIR USE; I. Introduction; II. The Principle of Interactions in Soil Use; III. Higher Production from Existing Arable Soils; IV. New Potentially Arable Soils; References; CHAPTER 3. GENETIC MODIFICATION OF PROTEIN QUALITY IN PLANTS; I. lntroduction; II. The Genetic Control of Protein Structure; III. The Relative Constancy of Leaf Protein Composition; IV. The Storage Proteins of Seeds; V. The opaque-2 and floury-2 Mutations in Maize

VI. The Prospects of Improvements in Other PlantsVII. Summary; References; CHAPTER 4. THE EXTRACTION, CHARACTERIZATION AND SIGNIFICANCE OF SOIL POLYSACCHARIDES; I. Soil Carbohydrates; II. The Significance of Soil Polysaccharides; III. Studies on Soil Polysaccharides; IV. Methods for the Analysis of Complex Polysaccharide Materials; V. Summary and Conclusions; References; CHAPTER 5. FRAGIPAN SOILS OF THE EASTERN UNITED STATES; I. Introduction; II. Horizons of Fragipan Soils; III. Occurrence of Fragipan Soils; IV. Properties of Fragipans; V. Fragipans and the Soil Water Regime

VI. Genesis of FragipansVII. Fragipans and Soil Use; VIII. Classification of Fragipan Soils.; IX. Unresolved Problems.; Summary; References; Appendix; CHAPTER 6. THE QUANTITATIVE RELATIONSHIPS BETWEEN PLANT POPULATION AND CROP YIELD; I. Introduction; II. Relationships between Plant Density and Crop Yield.; III. The Relationship between Plant Rectangularity and Crop Yield; IV. The Variation in Yield of the Individual Plant; V. Conclusions; References; Author Index; Subject Index

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