Pollution and Water Resources Columbia University Seminar Series XXIV-XXV [antikvár]

introduction In the twenty fourth and twenty fifth apaH,.,,.;. The published papers are dealing with the following topics: 1. The articles of the Columbia University Seminars team treat solid wastes and toxic wastes including treatment, removal and recycling. 2. The agricultural pollution problems of Hungary are described by the members of the Agricultural Sciences University, Debrecen concerning especially fertilisation, irrigation, nutrients, herbicides, pesticides, grass-land management including reconstruction environmentally damaged landscape and reiterated duplication of multigenes. 3. Finally, some problems on mineral waters, animal wastes, waste disposal systems and agricultural experimental services in Hungary are handled. The joint effort of this publication contributes to mutual understanding of environmental problems in semiarid rural regions. The Editorial Board of the Seminar Series together with the Steering Committee of the Seminar express their appreciation to all contributing members and lecturers. Their dedicated unselfish effort made the publication possible. The authors express appreciation to the University Seminars at Columbia University for assistance m the preparation of the manuscript for publication. Material drawn from this work was presented to the University Seminars on Pollution and Water Resources. It is gratefully acknowledged the support of the United States Council for InternatfonaTExchLge of Scholara, Fulbright Program. Further appreciation is due to the AgrkulS Iciences University in Debrecen for the generous fmancial contribution toward this publication. George J. Halasi-Kun Chairman of the University Seminars on Pollution and Water Resources, Columbia University Member of the Hungarian Academy of Sciences