From earlier ecological studies it has become apparent that simple univariate or bivariate statistics are often inappropriate, and that multivariate statistical analyses must be applied.
These are the proceedings of an Advanced Research Workshop (ARW), sponsored by the NATO Science Panel, entitled "e;Pest Control: Operations and Systems Analysis in Fruit Fly Management"e;.
In most of the developed countries of the,World, significant efforts to control the pollution of surface waters have been underway for decades, and particularly the last 10-15 years.
May I first congratulate, inconditionally, the Association MEDMARAVIS for organizing this symposium and for inviting me re- presenting the Sardinian Ministry of the Environment.
The protection of human health and food and fiber resources against the ravages of pests of many sorts is a continuous struggle by all people in the world.
Compared with forces occurring in soil mechanics problems in civil engineering, the forces that are applied to soil in farming operations generally have a short duration, less than a few seconds, a small loaded area, no more than a few square decimeters, and small intensities, 10 bar being a high value.
I am pleased to be able to introduce this book by Monsieur lean-Claude Gall, firstly because it is a book, secondly because its author has been a colleague for 15 years, and finally because it is a book which demonstrates the growing importance of Palaeobiology.
For several decades botanists have been impressed by the discovery that the distribution of secondary plant substances follows the general lines of plant relationships.
In keeping with the spirit of an Advanced Series in the Agricultural Sciences, we have attempted to address herein most of the current research areas being used to characterize, describe and manage salt-affected soils.
The development of a crop, and therefore its health, is always the result of interplay between biological and environmental factors, as influenced by human agency.
When, in 1966, the Gennan Research Society directed the attention of oceanographers in the Federal Republic of Ger- many to problems of marine pollution, I was not enthusiastic.
The International Biological Programme (IBP) was a cooperative effort on the part of scientists throughout the world, whose goal was an integrated study of the basic processes of biological productivity.
In the spring of 1969 a small meeting was convened at the CSIRO Riverina Laboratory, Deniliquin, New South Wales, to discuss the biology of the genus Atriplex, a group of plants considered by those who attended to be of profound importance both in relation to range management in the region and as a tool in physiological research.
The acid metabolism of certain succulent plants, now known as Crassulacean Acid Metabolism (CAM) has fascinated plant physiologists and biochemists for the last one and a half centuries.
In the European Alps the importance of forests as protection against ava- lanches and soil erosion is becoming ever clearer with the continuing increase in population and development of tourism.
Animals are important components of any ecosystem and it is impossible to describe structure and funCtioning of the Fennoscandian tundra ecosystems without including this part of the system.
No other disjunct pieces of land present such striking similarities as the widely sepa- 1 rated regions with a mediterranean type of climate, that is, the territories fringing the Mediterranean Sea, California, Central Chile and the southernmost strips of South Mrica and Australia.
