Agricultural science

The success of shifting cultivation systems developed by subsistence farmers testifies to the resilience of the "e;natural"e; soil-plant ecosystems to recover from the offtake of nutrients in crops and loss of soil struc- ture.

The object of this book is to introduce ethology to agricultural and veterinary students.

The fifth meeting of scientists working with Frankia and actinorhizal plants was held at Montmorency Forest of Laval University in Quebec from August 6-8, 1984.

It has long been recognized that soil organic matter is the key to soil fertility.

Disposal of organic sludge and liquid agricultural wastes is a universal problem.

MYRON J.

F.

The mission of the International Fertilizer Development Center is to increase food production through the improvement of fertilizers and fertilizer practices for the developing countries with special emphasis on tropical and subtropical agriculture.

Fertilizer is a vital component of strategies for expanding foodproduction.

This volume presents the proceedings of the Second International Sym- posium on Genetic Aspects ofPlant Minerai Nutrition, held in Madison, Wisconsin in 1985.

PH.

The steadily increasing cost of nitrogen fertilizer has resulted in more emphasis on basic and applied studies to improve nitrogen use efficiency in lowland rice.

The use of organic residues as a means of maintaining and increasing soil fertility is of long-standing.

Probably more than any other element, iron markedly influences the chemical and physical properties of soils and sediments in the earth.

The 22nd International Dairy Congress was the first to offer to participants the opportunity to present their work in the form of a poster, the object being to include more con- tributions in the programme than there was time available for oral presentations.

Forty years ago, when PLANT AND SOIL first appeared, Europe was still recovering from the devastating effects of World War II.

The photosynthetic process of higher plants converts carbon dioxide, water, and, light quanta into reduced sugars.

Food security, one of the basic human rights, seems to be ever eluding the people of sub-Saharan Africa.

Deserts are parts of the Earth that receive little or no rain; 25 cm or less per year.

On the occasion of its twenty-fifth anniversary, in 1985, the Netherlands Society for Grassland and Fodder Crops (NVWV) agreed to organize an International Symposium on a topic related to intensive grass and fodder production systems.

Sixty years ago at the Waite Agricultural Research Institute, G.

W.

This volume contains the Proceedings of the International Conference on Effects of Crop Rotation on Potato Production in the Temperate Zones.

About four years ago Dr.

Old and New Fields of Old-Field Ecology In ecology, succession occupies a place similar to that of evolution in general biology.

Agricultural soils are subjected to many applied mechanical stresses that influence their behavior.

This volume certainly is a Conference Proceedings, the Proceedings of the NATO Advanced Research Workshop (ARW) on "e;Unsaturated Flow in Hydrologic Modeling"e; held at "e;Les Villages du Soleil"e; near ArIes, France from June 13 to 17, 1988.

The protection of groundwater resources has emerged in recent years as a high priority topic on the agenda of many countries.

This book provides an excellent illustration of the interrelationship between progress in scientific methodology and conceptual advances, and its publica- tion should contribute to further advances.

The NATO Advanced Research Workshop from which this book derives was conceived during Biotec-88, the Second Spanish Conference on Biotechnology, held at Barcelona in June 1988.

Interest and initiatives in agroforestry education and training, as in other aspects of agroforestry development, have increased tremendously during the past decade.

In 1980, the International Symposium on the Ecology of Bruchids Attacking Legumes (Pulses), organized by Dr.

The main purpose of this book is to provide the theoretical background to engineers and scientists engaged in modeling transport phenomena in porous media, in connection with various engineering projects, and to serve as a text for senior and graduate courses on transport phenomena in porous media.

This book brings together research into the process of stream acidification and its impact on Welsh surface waters, carried out over the past decade or so.

1.

The irrigated area in the Aral Sea basin totals about 7.

Nitrogen Economy in Tropical Soils presents an authoritative and comprehensive state-of-the-art review on soil/plant nitrogen inter-relationships, with special reference to tropical soils and crops in aerobic and anaerobic environments.

This volume provides a selection of the most significant papers presented at the 15th International Seaweed Symposium in Valdivia, Chile, in January 1995.

Desertification has re-emerged as a topic of global significance as a consequence of the United Nations Conference on Environment and Development.

As atmospheric concentrations of greenhouse gases continue to increase, so does the potential for atmospheric warming and associated climate change.

The Australasia-Pacific Region supports approximately 50% of the world's population.

Agricultural Biochemistry will provide an introduction to the subject of biochemistry from a perspective that will be particularly applicable to agricultural scientists.

Over the last century the discharge of crude or partially treated sewage has probably been the most widespread, most documented and certainly the best understood form of pollution entering the aquatic environment.

Biotechnology for Waste Management and Site Restoration covers: waste management - solid, gaseous, liquid; site restoration - radioactivity, organics, toxic metals; educational, economic, social and business aspects; and international collaboration.

These Proceedings contain both oral and poster contributions to the first interna- tional conference"e; Field Screening Europe - Strategies and Techniques for On-Site Investigation and Monitoring of Contaminated Soil, Water and Air"e;, held in Karls- ruhe September 29 - October 1, 1997.