Nematology, as an independent discipline of Plant Protection is quite young. Organised research was started about 50 years back with Netherlands and U.K. amongst the European countries and the USA taking in the lead. With more and more training imparted to the young scientists, interested in this branch of science, new disease problems came to be recognized. The golden nematode of potato, the stem and bulb eelworm on ornamentals as well as some other important crops in Europe, the root-knot nematodes in the vegetable crops, the 'molya' disease of wheat and barley in India, the burrowing nematode on citrus and banana are some of the well known disease problems all over the world. Several disease problems still remain unrecognized or have not been able to attract attentions because of the uneconomic plants being attacked by them presently. The subterranean nature of most of the plant parasitic nematodes, their microscopic size, slow and debilitating type of disease expression rather than a killing effect on the attacked plants are some of the' important reasons which have precluded any sustained attentions from the farmers and the administrators. Additionally, the plants are rarely subject to association with a single pathogenic organism. The nematodes may act as initiators also for other so borne fungal diseases. The total disease picture, therefore, necessitates a thorough understanding of the influencing factors of the various organisms in the symptom expression of the diseases. The present book brings forward, at one place, the informations generated through the years on the various disease problems present in the world. A brief account on the morphology and biology of the nematodes has been given also for a comprehensive understanding of the nematodes and the diseases caused by them.

University Grants Commission (UGC) conducts a competitive test (NET) for Lectureship and Junior Research Fellowship (JRF) for Indian Universities. Similarly various States also conduct similar tests (SLET) for recruitment in their universities and colleges. CSIR too conducts tests for filling position in its fold.

This comprehensive book is designed to serve as a guide for all the aspirants, appearing at above said examinations in a particular subject. It is strictly in accordance with UGC-syllabus.

This volume on Agriculture contains all required information on the subject. The topics are categorically described in analytical and coherent way.

The past few decades has seen an unprecedented accumulation of knowledge concerning environmental science. School, College and University courses, initially structured to meet the growing demand for environmental awareness has become an uphill struggle for teacher and student alike. Teachers, instructors, lecturers and professors invariably specialists in any one the number of disciplines have to garner information from journals quite remote from their own fields. This is really a time consuming job and is likely to be avoided by everyone. Even after relevant information is gathered, the rational organization of the material has become a logistic problem.

It is against such a background that Encyclopaedia of Environmental Sciences has been written to meet the demands of an audience having many different specializations. The different volumes contain detailed information both text and case on topics and issues relating to ecology, pollution control, environmental impact assessment, pollution monitoring in mining, petrochemical, textile, rubber, alcohol, sugar, pharmaceuticals and other chemical industries.

The primary goal of preparing these volumes is to present a balanced view of the diversity of issues that relate to the environment and to provide the fundamental information that will allow students to understand the complexities of those issues. The other goal for preparing these volumes is to focus on underlying principles and the exciting advances in understanding that have characterized the last decade of environmental science.

'Environment,' 'Ecology', Pollution' and other such terms gained wide prevalence in the last decades only when 'environmental pollution' reaches to climax and its control was felt necessary for survival of all living beings including man. Now environmental education is a significant part of educational system from school level to the top. Environmental study is an independent and full fledged discipline now.

The present book, in two volumes, is devised to serve as an ideal textbook as well as reference book. Topics viz. Profiles of ecology, Concept of ecology, Population ecology, Marine ecology, Biotic communities, Natural resources, Distributing of fauna and flora, world environment scenario, Ganga pollution, Environment impact assessment, Toxic waste management, Domestic pollution, Fiscal incentives for environmental pollution, Power industry, Iron and steel industry and mining industry etc. are elaborately discussed. Supported by data and suitable diagrams, the book has become most informative and useful.