Modeling Environmental Policy demonstrates the link between physical models of the environment and policy analysis in support of policy making. Each chapter addresses an environmental policy issue using a quantitative modeling approach. The volume addresses three general areas of environmental policy - non-point source pollution in the agricultural sector, pollution generated in the extractive industries, and transboundary pollutants from burning fossil fuels. The book concludes by discussing the modeling efforts and the use of mathematical models in general.

Since the beginning of agricultural production, there has been a continuous effort to grow more and better quality food to feed ever increasing popula tions. Both improved cultural practices and improved crop plants have allowed us to divert more human resources to non-agricultural activities while still increasing agricultural production. Malthusian population predictions continue to alarm agricultural researchers, especially plant breeders, to seek new technologies that will continue to allow us to produce more and better food by fewer people on less land. Both improvement of existing cultivars and development of new high-yielding cultivars are common goals for breeders of all crops. In vitro haploid production is among the new technologies that show great promise toward the goal of increasing crop yields by making similar germplasm available for many crops that was used to implement one of the greatest plant breeding success stories of this century, i. e., the development of hybrid maize by crosses of inbred lines. One of the main applications of anther culture has been to produce diploid homozygous pure lines in a single generation, thus saving many generations of backcrossing to reach homozygosity by traditional means or in crops where self-pollination is not possible. Because doubled haploids are equivalent to inbred lines, their value has been appreciated by plant breeders for decades. The search for natural haploids and methods to induce them has been ongoing since the beginning of the 20th century."

Since the beginning of agricultural production, there has been a continuous effort to grow more and better quality food to feed ever increasing popula tions. Both improved cultural practices and improved crop plants have alIowed us to divert more human resources to non-agricultural activities while still increasing agricultural production. Malthusian population predictions continue to alarm agricultural researchers, especially plant breeders, to seek new technologies that will continue to allow us to produce more and better food by fewer people on less land. Both improvement of existing cultivars and development of new high-yielding cultivars are common goals for breeders of alI crops. In vitro haploid production is among the new technologies that show great promise toward the goal of increasing crop yields by making similar germplasm available for many crops that was used to implement one of the greatest plant breeding success stories of this century, i. e., the development of hybrid maize by crosses of inbred lines. One of the main applications of anther culture has been to produce diploid homozygous pure lines in a single generation, thus saving many generations of backcrossing to reach homozygosity by traditional means or in crops where self-pollination is not possible. Because doubled haploids are equivalent to inbred lines, their value has been appreciated by plant breeders for decades. The search for natural haploids and methods to induce them has been ongoing since the beginning of the 20th century."

A two-sector model of a developing country consisting of agriculture and industry is presented. Growth and structural change are discussed in variants with exogenous as well as endogenous technical progress, algebraically and by numerical simulations. Consequences from taking into account peculiarities of food production and consumption are analyzed. These include technology adoption in agriculture, Engel's law and a relationship between the level of nutrition and productivity.

In "An Anxious Pursuit," Joyce Chaplin examines the impact of the Enlightenment ideas of progress on the lives and minds of American planters in the colonial Lower South. She focuses particularly on the influence of Scottish notions of progress, tracing the extent to which planters in South Carolina, Georgia, and British East Florida perceived themselves as a modern, improving people. She reads developments in agricultural practice as indices of planters' desire for progress, and she demonstrates the central role played by slavery in their pursuit of modern life. By linking behavior and ideas, Chaplin has produced a work of cultural history that unites intellectual, social, and economic history.
Using public records as well as planters' and farmers' private papers, Chaplin examines innovations in rice, indigo, and cotton cultivation as a window through which to see planters' pursuit of a modern future. She demonstrates that planters actively sought to improve their society and economy even as they suffered a pervasive anxiety about the corrupting impact of progress and commerce. The basis for their accomplishments and the root of their anxieties, according the Chaplin, were the same: race-based chattel slavery. Slaves provied the labor necessary to attain planters' vision of the modern, but the institution ultimately limited the Lower South's ability to compete in the contemporary world.
Indeed, whites continued to wonder whether their innovations, some of them defied by slaves, truly improved the region. Chaplin argues that these apprehensions prefigured the antimodern stance of the antebellum period, but she contends that they were as much a reflection of the doubt inherent in theories of progress as an outright rejection of those ideas.

The 18 chapters making up In Vitro Haploid Production in Higher Plants are divided into two sections. Section 1 (eight chapters) covers historical and fundamental aspects of haploidy in crop improvement. Section 2 deals with methods of haploid production, including anther culture, micropore culture, ovary culture, pollination with irradiated pollen, in vitro pollination, and special culture techniques, including polyhaploid production in the Triticeae by sexual hybridization, the influence of ethylene and gelling agents on anther culture, conditional lethal markers, and methods of chromosome doubling.

This important new volume presents a plethora of research on the distribution of heavy metals in soils and rocks of natural habitats, farmlands, and urbanized areas along with the factors influencing their bioavailability. The authors evaluate the content of organic matter, soil acidity, mineral fertilizers, and more. Developed for ecologists and specialists in the field of environmental protection and the conservation of biological diversity, the book presents the problems of reducing the anthropogenic load on the surrounding countryside and focuses on sustainable agricultural development.

Explores the cultural framework within which changes in agricultural technology and economic organization occur and the ways in which changes in the social fabric influence attitudes toward rural work and the peasantry.

The idea for this book began in Sofia, Bulgaria in September, 1992 when we met to plot a course for our University Affiliations project which had been recently funded by the U.S. Infonnation Agency. We believed that worldng on the book would provide valuable learning experiences for all the cooperators, and that the book itself would make a useful contribution to understanding the economic transition process and its policy implications. We recognized that a project of this nature would require the skills and knowledge of many people. To those 34 additional contributors to this volume, and to the many other friends, colleagues, and experts who gave generous advice, we give our sincerest thanks. We also acknowledge with thanks the support of several organizations to a reality. Much of the that transfonned this book from an idea research reported here was a major part of an educational project funded by the University Affiliations Program of the U.S. Information Agency. The project linked the University of California, Berkeley, Wye College of London University, and the Research Institute of Agricultural Economics, Sofia, in a cooperative effort to improve the quality of policy analysis. The research provided hands-on experience necessary for effective teaching in this area.

Applying a feminist and environmentalist approach to her investigation of how the changing global economy affects rural women, Carolyn Sachs focuses on land ownership and use, cropping systems, and women's work with animals in highly industrialized as well as developing countries.Viewing rural women's daily lives in a variety of circumstances, Sachs analyzes the rich multiplicity of their experiences in terms of their gender, class, and race. Drawing on historical and contemporary research, rural women's writings, and in-depth interviews, she shows how environmental degradation results from economic and development practices that disadvantage rural women. In addition, she explores the strategies women use for resistance and survival in the face of these trends.Offering a range of examples from different countries, "Gendered Fields" will appeal to readers interested in commonalities and differences in women's knowledge of and interactions with the natural environment.

Recent concerns about energy security in the US have drawn greater attention to agriculture's role as a producer and consumer of energy. Agriculturally-derived energy sources such as ethanol, biodiesel, biomass, and windpower presently supply between 0.3% and 0.50% of the energy consumed in the US. Organized into two parts, the first section of this book examines agriculture's role as a producer and consumer of energy, the integration of biomass energy into the US energy systems, a policy overview, and outlooks for energy production and consumption. The second section is a compendium of current research including the economic viability of ethanol and biodiesel; energy conservation and efficiency in agriculture; new methods and technologies; and environmental impacts and considerations.

Agriculture was a major item on the agenda of the Uruguay Round of multilateral trade negotiations under the auspices of the General Agreement on Tariffs and Trade (GATT), launched in 1986. In this specially commissioned volume the national positions on agriculture taken up by the major players during the course of these negotiations are set out and analyzed, country by country, by a team of internationally renowned experts. The editors have selected and ordered the studies to provide a coherent assessment and synthesis of the main issues and areas of controversy raised by the negotiations. Examination of the reasons for the holding of different national perspectives on the issue of agricultural policy and trade reform helps to explain why reaching international agreement in this area of the GATT negotiations has been so elusive.

Our requirement for plant breeders to be successful has never been greater. However one views the forecasted numbers for future population growth we will need, in the immediate future, to be feeding, clothing and housing many more people than we do, inadequately, at present. Plant breeding represents the most valuable strategy in increasing our productivity in a way that is sustainable and environmentally sensitive. Plant breeding can rightly be considered as one of the oldest multidisciplinary subjects that is known to humans. It was practised by people who first started to carry out a settled form of agriculture. The art, as it must have been at that stage, was applied without any formal underlying framework, but achieved dramatic results, as witnessed by the forms of cultivated plants we have today. We are now learning how to apply successfully the results of yet imperfect scientific knowledge. This knowledge is, however, rapidly developing, particularly in areas of tissue culture, biotechnology and molecular biology. Plant breeding's inherent multifaceted nature means that alongside obvious subject areas like genetics we also need to consider areas such as: statistics, physiology, plant pathology, entomology, biochemistry, weed science, quality, seed characteristics, repro ductive biology, trial design, selection and computing. It therefore seems apparent that modern plant breeders need to have a grasp of wide range of scientific knowledge and expertise if they are successfully to a exploit the techniques, protocols and strategies which are open to them.

Nitrogen is the most limiting element for crop production. Traditionally, expensive commercial fertilizers are used to correct soil nitrogen deficiencies. Indeed, 50% of the increase in rice yields after World War II can be attributed to increased fertilizer nitrogen use. Although an increased rate of fertilizer nitrogen application has been advocated to meet the growing demand for food, it is unrealistic to advise the farmers to apply fertilizers they could hardly afford, and whose prices are likely to escalate in the years ahead. In addition, when they are not applied judiciously there are problems of environmental pollution as plants are capable of taking up only a relatively small portion of the applied nitrogen, a substantial amount being lost through various chemical and biological processes. The exploitation of cheaper alternatives or supplements to fertilizers have therefore gained much interest in recent years. Our increased interest in biological nitrogen fixation as a supplement or alternative to nitrogen fertilizers led to the convening of a consultants' meeting on The Role of Isotopes in Studies on Nitrogen Fixation and Nitrogen Cycling by Blue-Green Algae and the Azolla-Anabaena azollae Association', in Vienna from 11--15 October 1982. The consultants' group recommended that the Joint FAI/IAEA Division of Nuclear Techniques in Food and Agriculture embark on a coordinated research programme in this field and that initial emphasis should be placed on Azolla-Anabaena symbiosis. As a result, such a programme was initiated in 1984, which was concluded in 1989. The results and conclusions reported here are those that were generated during the five years of its operation.

The First Asia --- Pacific Conference on Agricultural Biotechnology was held in Beijing, China on 20-24, August, 1992. Over half the population in the world is in the Asian and Pacific Region. With an increasing population and decreasing farming lands, it is important to develop agricultural biotechnology for improvement of the productivity, profitability and stability of the farming system. The Conference's main objectives were to bring together scientists working in different fields of agricultural biotechnology to stimulate discussion on this important process and to have an appraisal of the most recent studies concerning genetic manipulation of plants, plant cell and tissue culture, plant gene regulation, plant-microbe interaction, animal biotechnology etc. The Conference was attended by 391 scientists from different countries and regions. This volume presents the contributions of the lectures and a selected number of posters, which are an up-to-date account of the state of knowledge on agricultural biotechnology. The book provides a valuable reference source not only for specialists in agricultural biotechnology, but also for researchers working on related aspects of agronomy, biochemistry, genetics, molecular biology, microbiology and animal sciences. It is with great pleasure to acknowledge the contributions of the authors in assuring the prompt publication of this volume. We would also extend our sincere thank to Kluwer Academic Publishers for the publication of these proceedings.

In response to increasing concerns about the degradation of natural resources and the sustainability of agriculture, many research programs have been established in natural resource management (NRM). However, although methods for evaluating the impacts of crop improvement technologies are well developed, there is a dearth of methods for evaluating the impacts of NRM interventions. This is partly due to the complexity of interactions among natural resources, spatial and temporal dimensions of impact, and the valuation of direct and indirect environmental costs and benefits. This book discusses the unique features and methodological difficulties of NRM impact assessment. It examines the strengths and weaknesses of various impact assessment approaches, including econometric, bio-economic, and more direct methods. It also assesses and identifies data requirements for developing impact indicators and recommends suitable methodologies for assessing the impacts of NRM technologies on issues such as soil and water conservation and watershed and biodiversity management.

The Symposium on high salinity tolerant plants, held at the University of Al Ain in December 1990, dealt primarily with plants tolerating salinity levels exceeding that of ocean water and which at the same time are promising for utilization in agriculture or forestry. These plants could be very useful for a country like the UAE where fresh water resources are very scarce and the groundwater available at some places is already very salty. More than 60 million woody trees/shrubs have been planted so far and more are planned for the inland plains underlain with brackish groundwater. These species were no solution for the widely barren shoreline of the UAE. Here mangrove species were of potential use, and one species, Avicennia Marina, occurs widely and has been successfully planted for about a decade. Converting the tree plantations into economically useful cropping systems is still a problem requiring much research and development. The book deals in several sections with conventional irrigation systems using marginal water. The species used in these systems are mostly hybrids of conventional crops. The irrigation systems, however, have similar problems as may be expected for irrigation with seawater. Papers show the participants' experiments in this area. The volume serves as a link between scientists working for the improvement of classical irrigation systems and those interested in the application of a new dimension of salinity levels for irrigation water.

In continuation from the previous three volumes 17, 18, and 19 on High-Tech and Micropropagation this volume presents 29 chapters on the propagation of ornamental plants through modern biotechnological methods. The species covered include "Alstromeria," "Antirrhinum," "Begonia," "Chrysanthemum," "Cornus," "Euphorbia," "Gardenia," "Gladiolus," "Hyacinthus," "Impatiens," "Iris," "Lycoris," "Nematanthus," "Paeonia," "Pelargonium," "Phalaenopsis," "Rhododendron," "Ruscus," "Saintpaulia," "Senecio," "Syringa," orchids, cacti, roses, and Boston ferns. In addition, one chapter is devoted to micropropagation of virus-free ornamentals in the CIS. Throughout the book, detailed protocols as well as a comprehensive review of the literature are provided. Advanced students, teachers, and researchers in the fields of floriculture, horticulture, and plant biotechnology in general, and also those interested in industrial or commercial micropropagation will find a wealth of useful information in the book.

This 1974 book was made available as a second edition in 1979. It provides an understanding of the ways in which the various physiological processes are integrated to produce the responses shown by whole plants growing in the variable environment in the field, whilst stressing the quantitative aspects of these relationships. This was the first general text to attempt such a treatment, thereby digesting much material that had been found only in research papers or detailed monographs and complementing the reductionist approach of most standard texts of plant physiology. Most of the subject matter concerns agricultural systems, but many of the concepts and approaches are applicable to more complex natural ecosystems. Emphasis is placed on integrating knowledge from many sources and on trying to assess quantitatively the importance of each component. The result is a comprehensive account making the book a valuable background for all interested in the study of plants in the field.

Wind erosion has such a pervasive influence on environmental and agricultural matters that academic interest in it has been continuous for several decades. However, there has been a tendency for the resulting publications to be scattered widely in the scientific litera ture and consequently to provide a less coherent resource than might otherwise be hoped for. In particular, cross-reference between the literature on desert and coastal morphology, on the deterioration of wind affected soils, and on the process mechanics of the grain/air flow system has been disappointing. A successful workshop on "The Physics of Blown Sand," held in Aarhus in 1985, took a decisive step in collecting a research community with interests spanning geomorphology and grain/wind process mechanics. The identification of that Community was reinforced by the Binghampton Symposium on Aeolian Geomorphology in 1986 and has been fruitful in the development of a number of international collaborations. The objectives of the pre sent workshop, which was supported by a grant from the NATO Scientific Affairs Division, were to take stock of the progress in the five years to 1990 and to extend the scope of the community to include soil deterioration (and dust release) and those beach processes which link with aeolian activity on the coast."

Wind erosion has such a pervasive influence on environmental and agricultural matters that academic interest in it has been continuous for several decades. However, there has been a tendency for the resulting publications to be scattered widely in the scientific litera ture and consequently to provide a less coherent resource than might otherwise be hoped for. In particular, cross-reference between the literature on desert and coastal morphology, on the deterioration of wind affected soils, and on the process mechanics of the grain/air flow system has been disappointing. A successful workshop on "The Physics of Blown Sand," held in Aarhus in 1985, took a decisive step in collecting a research community with interests spanning geomorphology and grain/wind process mechanics. The identification of that Community was reinforced by the Binghampton Symposium on Aeolian Geomorphology in 1986 and has been fruitful in the development of a number of international collaborations. The objectives of the pre sent workshop, which was supported by a grant from the NATO Scientific Affairs Division, were to take stock of the progress in the five years to 1990 and to extend the scope of the community to include soil deterioration (and dust release) and those beach processes which link with aeolian activity on the coast."

Invasive species are everywhere, from forests and prairies to mountaintops and river mouths. Their rampant nature and sheer numbers appear to overtake fragile native species and forever change the ecosystems that they depend on. Concerns that invasive species represent significant threats to global biodiversity and ecological integrity permeate conversations from schoolrooms to board rooms, and concerned citizens grapple with how to rapidly and efficiently manage their populations. These worries have culminated in an ongoing "war on invasive species," where the arsenal is stocked with bulldozers, chainsaws, and herbicides put to the task of their immediate eradication. In Hawaii, mangrove trees (Avicennia spp.) are sprayed with glyphosate and left to decompose on the sandy shorelines where they grow, and in Washington, helicopters apply the herbicide Imazapyr to smooth cordgrass (Spartina alterniflora) growing in estuaries. The "war on invasive species" is in full swing, but given the scope of such potentially dangerous and ecologically degrading eradication practices, it is necessary to question the very nature of the battle. Beyond the War on Invasive Species offers a much-needed alternative perspective on invasive species and the best practices for their management based on a holistic, permaculture-inspired framework. Utilizing the latest research and thinking on the changing nature of ecological systems, Beyond the War on Invasive Species closely examines the factors that are largely missing from the common conceptions of invasive species, including how the colliding effects of climate change, habitat destruction, and changes in land use and management contribute to their proliferation. Beyond the War on Invasive Species demonstrates that there is more to the story of invasive species than is commonly conceived, and offers ways of understanding their presence and ecosystem effects in order to make more ecologically responsible choices in land restoration and biodiversity conservation that address the root of the invasion phenomenon. The choices we make on a daily basis-the ways we procure food, shelter, water, medicine, and transportation-are the major drivers of contemporary changes in ecosystem structure and function; therefore, deep and long-lasting ecological restoration outcomes will come not just from eliminating invasive species, but through conscientious redesign of these production systems.

Copper Nanostructures: Next-Generation of Agrochemicals for Sustainable Agroecosystems considers the impact of copper-based nanostructures on agri-food sectors. Sections highlight the green synthesis of copper nanoparticles, production mechanisms, eco-safety, and future perspectives, discuss the increasing importance of copper nanomaterials in plant protection applications, describe the use of copper nanostructures in plant science applications, cover antimicrobial applications, explore copper nanostructure applications, and summarize current applications in agroecosystems, such as copper nanoparticles as nanosensors, their negative ecological effects, estimation risks, and more.