Agricultural science

This volume summarises the result of an interdisciplinary research programme entitled `Rehabilitation of the Atmosphere of the New States of Germany - Effects on Terrestrial Ecosystems'.

Large areas of the warm, humid tropics in Southeast Asia, the Pacific, Latin America, the Caribbean, and Africa are hilly or mountainous.

Plant Production in Closed Ecosystems provides overviews of the current trends and concepts in plant production in closed or semi-closed environments.

Geomechanics is the basic science for many engineering fields, including oil and gas recovery, mining, civil engineering, water supply, etc.

Irrigated agriculture and the use of water resources in agriculture face the challenges of sustainable development.

SCOPE, the Scientific Committee on Problems of the Environment, was established by the International Council of Scientific Unions (ICSU) in 1969 as an international, non- to governmental, non-profit organisation with the mandate - advance knowledge of the influence of humans on their environment, as well as the effects of these environmental changes upon people, their health and their welfare- with particular attention to those influences and effects which are either global or shared by several nations; - to serve as a non-governmental, interdisciplinary and international council of scien- tists and as a source of advice for the benefit of governments and intergovernmental and non-governmental bodies with respect to environmental problems.

Wetlands could be described as land and water at Tropical wetlands: one and the same time, and as such are very specific on the brink ecosystems.

In April 1992 the Foundation Eni Enrico Mattei organized a workshop on the regulation of nonpoint source pollution.

The purpose of this book is to develop a general economic model which integrates the quantity and quality issues of water resource management and to provide, along with a detailed criticism of the policy instruments now in use, alternative proposals concerning the efficient allocation and distribution of water.

The series Tasks for Vegetation Science is devoted to a variety of research aspects in vegetation science, pure as wellas applied.

When approached by Warren Samuels, the series editor, about organizing a volume on natural resource economics, I was at a loss as to how one might possibly capture in "e;several major essays plus several shorter comments thereon"e; all of the diverse activities that fall within this exciting discipline.

Economic plants have been defined by SEPASAT as those plants that are utilised either directly or indirectly for the benefit of Man.

A fast-growing interest in the concepts and application of systems research has spawned a wide and general literature over the past decade.

I first became interested in the methods of planning the sequence and timing of jobs on large-scale development projects, as a field officer involved in planning and implementing mechanised farming schemes in Uganda in the mid-sixties.

In the 100 years since the legume-Rhizobium symbiotic nitrogen fixation interaction was first described, interest in this field has grown rapidly.

Biodegradation is the dominant pathway for the environmental transformation of most chemicals and information on a chemical's biodegradability is essential for proper risk assessment.

Bioremediation - the use of microorganisms for environmental clean-up - is a technology that is experiencing a rapid phase of development.

In situ remediation techniques have experienced a boom over the last few years, thereby producing a wide range of valuable experiences.

The economic significance of boron (B) in agriculture, horticulture, and forestry has been beyond dispute for several decades.

Acknowledgements Conference Summary R.

On behalf of the Russian Federation Committee on Water Economy, I would like to welcome the participants of the NATO-sponsored Workshop on the Problems of the Caspian Sea and the Circum-Caspian States.

During the last decade, research on Pseudomonas syringae pathovars and related pathogens has progressed rapidly, opening up many new avenues.

This book contains the proceedings of the `8th Nitrogen Workshop' which was held at the University of Ghent, Belgium, from 5 to 8 September 1994.

This volume comprises the proceedings of the First International Rehovot Conference on Modem Agriculture and the Environment, held at the Rehovot Campus of the Faculty of Agriculture, the Hebrew University of Jerusalem, Israel, 2-6 October 1994.

Systems approaches for agricultural development are needed to determine rational strategies for the role of agriculture in national development.

R.

Modeling Environmental Policy demonstrates the link between physical models of the environment and policy analysis in support of policy making.

Environmental Contamination and Remediation Practices at Former and Present Military Bases outlines the different strategies that are useful in the investigation and subsequent remediation of military bases, Particular attention is paid to the pollution of groundwater.

`Are the Great Lakes getting better or worse?

The International Society of Root Research sponsored the Symposium "e;Root Demographics and Their Efficiencies in Sustainable Agriculture, GrassLands and Forest Ecosystems,"e; July 14-18, 1996, at the Madren Conference Center, Clemson University, Clemson, South Carolina, USA.

Diazotrophic bacteria convert atmospheric nitrogen to plant-useable form and this input of nitrogen through biological fixation is of great agronomic importance.

Until the late 1970s, most commercial power plant operators outside the United States adopted a spent fuel management policy of immediate reprocessing and recycling of recovered products.

The study of soil nitrogen has long been an active field, but it was generally pivoted on agricultural and forestry production, and animal husbandry.

Shallow lakes differ from deep ones in many aspects of nutrient dynamics, biotic structure and interactions of various trophic levels.

In this study, an overview is presented of agricultural policies on manure and minerals, relating to the Nitrate Directive to remedy excessive surface- and groundwater contamination from intensive agricultural practices.

Agricultural pollution (with nitrates and pesticides) is one of the biggest threats to drinking water resources.

This is the second volume in the series Nutrients in Ecosystems.

Rice is the major staple food in Asia, and food security means rice security for most Asians.

Co-utilization or blending of residuals offers a unique opportunity to develop products with particular characteristics that are able to target specific customer needs.

The Rhizobiaceae, Molecular Biology of Model Plant-Associated Bacteria.

Students in Technical and Agricultural faculties spend only a limited amount of time on general economics, environmental economics and resource economics.

The arid frontier has been a challenge for humanity from time immemorial.

The appearance of this Second Edition has been encouraged by the favorable reception of the first.

Genetic Resources of Mediterranean Pasture and Forage Legumes is a comprehensive review of grassland improvement in Mediterranean areas using legume species.

Inputs of nitrogen to terrestrial and aquatic ecosystems have increased several-fold over the last one hundred and fifty years, with the steepest increases during the last four decades.