The floricultural industry has been undergoing an unprecedented revolu- tion in terms of the type of commodity produced and the production and marketing technology in both developed and developing countries.
This preface is being written at a time of exceptional public interest in the North Sea, following media head- lines on toxic algal blooms, the mass mortality of common seals, and concern over pollution levels.
The concept of controlled release has attracted increasing attention over the last two decades, with the applications of this technology proliferating in diverse fields in- cluding medicine, agriculture and biotechnology.
Properly treated sewage effluent becomes an alternative source of irrigation water, and at the same time it provides a convenient means of sewage disposal through land treatment to prevent potential health and environmental hazards caused by uncontrolled flow of wastewater.
In March, 1983 a workshop on Pollutants in Porous Media was hosted by the Institute of Soils and Water of the Agricultural Research Organi- zation in Bet Dagan, Israel.
With improved microscope and preparation techniques, studies of histo- logical structures of plant organisms experienced a revival of interest at the end of the 19th century.
Wood is formed in an essentially water-saturated environment in the living tree, and the cell wall remains in this state until the water flow from the roots is interrupted, such as by felling the tree.
In Physical Processes in Estuaries the present day knowledge of the physics of transport phenomena in estuaries and their mathematical treatment is summarized: It is divided into following parts: - Water movements in estuaries - Estuarine fronts and river plumes - Internal waves and interface stability - Fine sediment transport, aggregation of particles, settling velocity of mud flocs - Sedimentation and erosion of fine sediments.
It is widely recognized that spiral grain in trees severely reduces the value of sawn timber through warping and loss of strength, and that it also causes problems for other wood uses as diverse as transmission poles or plywood.
The structural complexity of lignin has continually challenged the in- genuity of researchers to develop suitable methods for its charac- terization prior to and following a wide variety of chemical, biologi- cal, and physical treatments.
Von der Arbeits gruppe Systemforschung an der Universität Osnabrück wird im Auftrag der International Union of Biologica1 Sciences (IUBS) ein Projekt zur Erstellung von sogenannten Element-Konzentrations Katastern in Ökosystemen (ECCE) entwickelt, das alle großen Ökosysteme der Erde einschließen soll.
This book contains the contributions to an European symposium on "e;Trace Elements in Environmental History"e;, held from June 24th to 26th at GCittingen, FRG.
It is apparent that wilt diseases continue to be a major problem in crop production because of the number of crops affected, the number and genetic variability of pathogens involved, and their widespread occurrence throughout tropical and temperate regions under a variety of cropping systems.
In recent years, tropical forests have received more attention and have been the subject of greater environmental concern than any other kind of vegetation.
Dredged Material and Mine Tailings are two of the same thing once they are deposited on land: they must be safe-guarded, wash-out must be prevented, and they must be protected by a plantcover.
This monograph has been written in the hope that it will prove of value to medical students and clinicians, to Honours undergradu- ates in appropriate branches of the natural sciences, and to repro- ductive biologists in general.
th th On June 17 and 18 1987 the fourth workshop on "e;Azospi- rillum: Genetics, Physiology, Ecology"e; took place at the Uni ver- sity of Bayreuth, West Germany, organized by the Genetics depart- ment.
At last geochemists are offered one comprehensive reference book which gives the Eh-pH diagrams for 75 elements found in the earth's surface environment, including transuranic and other radioactive species.
Low temperature represents, together with drought and salt stress, one of the most important environmental constraints limiting the pro- ductivity and the distribution of plants on the Earth.
