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Advances in Soil Science By E.G. Beauchamp

Advances in Soil Science by E.G. Beauchamp

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Summary

Soil is formed from physical and chemical weathering of rocks - processes described historically because they involve eons of time-by glaciation and by wind and water transport of soil materials, later deposited in deltas and loessial planes.

Advances in Soil Science Summary

Advances in Soil Science: Volume 10 by E.G. Beauchamp

Soil is formed from physical and chemical weathering of rocks - processes described historically because they involve eons of time-by glaciation and by wind and water transport of soil materials, later deposited in deltas and loessial planes. Soil undergoes further transformations over time and provides a habitat for biological life and a base for the development of civilizations. Soil is dynamic -always changing as a result of the forces of nature and particularly by human influences. The soil has been studied as long as history has been documented. Numerous references to soil are found in historical writings such as Aristotle (384-322 B. c. ), Theophrastus (372-286 B. c. ), Cato the Elder (234-149 B. C. ) and Varro (116-27 B. c. ). Some of the earliest historical references have to do with erosional forces of wind and water. The study of soils today has taken on increased importance because a rapidly expanding population is placing demands on the soil never before experienced. This has led to an increase in land degradation and desertification. Desertifica tion is largely synonymous with land degradation but in an arid land context. Deterioration of soil resources is largely human induced. Poverty, ignorance, and greed are the indirect causes of desertification. The direct cause is mismanage ment of the land by practices such as overgrazing, tree removal, improper tillage, poorly designed and managed water distribution systems, and overexploitation.

Table of Contents

Reactions Controlling Heavy Metal Solubility in Soils.- I. Introduction.- II. Ion-Exchange on Layer Silicates.- III. Chemisorption on Mineral Surfaces.- IV. Nucleation, Precipitation, and Solid Solutions.- V. Redox Processes Affecting Metal Solubility.- VI. Metal Adsorption by Organic Matter.- VII. Speciation of Metals in Solution.- VIII. Summary.- References.- The Components of Nitrogen Availability Assessments in Forest Soils.- I. Introduction.- II. The Framework.- III. The Methods.- IV. Conclusions.- Acknowledgments.- References.- Carbon Sources for Bacterial Denitrification.- I. Introduction.- II. Carbon Sources.- III. Natural C Substrates.- IV. Coculture and Multiculture Systems.- V. Decomposition of Organic Materials and Denitrification.- VI. Denitrification in Relation to Measured Available Soil C Substrate.- VII. Denitrification Near Roots.- VIII. Acetylene as a C Substrate for Denitrifiers.- IX. Denitrification Kinetics Involving C Substrates.- X. Denitrification Versus Dissimilatory Nitrate Reduction.- XI. Summary.- Acknowledgments.- References.- Integrated Nitrogen Management in Irrigated Rice.- I. Introduction.- II. Efficiency of Nitrogen Fertilizer.- III. Ammonia Volatilization Loss.- IV. Denitrification Loss.- V. Management Agenda to Increase Nitrogen Use Efficiency.- VI. Supplemental Sources of Nitrogen.- VII. Knowledge Gaps.- References.- Tropical Soils and Soil Classification Updates.- I. Introduction.- II. Keys to Soil Taxonomy 1987.- III. The FAO-UNESCO 1988 Update.- IV. Classifications and Soils of the Tropics.- References.

Additional information

NLS9781461388494
9781461388494
146138849X
Advances in Soil Science: Volume 10 by E.G. Beauchamp
New
Paperback
Springer-Verlag New York Inc.
2011-11-08
200
N/A
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