This book consists of papers presented at a symposium "PLANT-INDUCED SOIL CHANGES: PROCESSES AND FEEDBACKS" that was held during the American Society of Agronomy-Soil Science Society of America Annual Meeting in Indianapolis, November 4-8, 1996. The papers were also pub of Biogeochemistry (Vol. 42, nos. 1 and 2, 1998). The lished in a special issue symposium was built on the growing realisation that plant-induced changes in soil feed back in various ways to natural vegetations, giving rise to a plethora of plant-soil interactions beyond the classical one-way cause-and-effect pathways...

This book by soil scientists and ecologists reviews how and why plants influence soils. Topics include effects on mineral weathering, soil structure, and soil organic matter and nutrient dynamics, case studies of soil-plant interactions in specific biomes and of secondary chemicals influencing nutrient cycling, the rhizosphere, and potential evolutionary consequences of plant-induced soil changes. This is the first volume that specifically highlights the effects of plants on soils and their feedbacks to plants. By contrast, other texts on soil-plant relationships emphasize effects of soil...

This book is written as a reference on organic substances in natural waters and as a supplementary text for graduate students in water chemistry. The chapters address five topics: amount, origin, nature, geochemistry, and characterization of organic carbon. Of these topics, the main themes are the amount and nature of dissolved organic carbon in natural waters (mainly fresh water, although seawater is briefly discussed). It is hoped that the reader is familiar with organic chemistry, but it is not necessary. The first part of the book is a general overview of the amount and general nature of...

MYRON J. MITCHELL* The biota of soils constitute an integral part of both natural and agronomic ecosystems. The soil microflora and fauna in conjunction with the belowground portion of the Metaphyta or higher plants constitute the living milieu, components of which are in intimate association with each other as well as the abiotic constituents of the soil. Since these associations or interactions are important in regulat- ing both the flux and availability of energy and nutrients, the central theme of the present book focuses on these interactions. The effects of microfloral and faunal inter-...

It is presently well recognized that total concentrations of trace elements in any environmental compartment supply insufficient information to understand important phenomena. The distinction and separate analysis of specific chemical species are essential for understanding cycles in the aquatic environment, involving identification and quantification of sources, transport pathways, distributions and sinks, or, in the area of interactions between trace elements and organisms to understand uptake, distribution, excretion mechanisms and effects. In the past, various ways have been developed to...