J. N. Srivastava, PhD, has over 20 years of experience in teaching undergraduate, postgraduate, and PhD classes on plant pathology as Associate Professor cum Senior Scientist at Bihar Agricultural University, India, and as Assistant Professor/Jr. at Sher-e-Kashmir University of Agriculture Sciences and Technology, India. In addition to teaching and research, he is also engaged in various agriculture extension activities, such as farm advisory services, and has acted as principal investigator and co-principal investigator for several projects on biological control/integrated disease management. A prolific author, Dr. Srivastava has published many research papers in both Indian and international journals, book chapters, extension articles, practical and technical bulletins, and leaflets. A. K. Singh, PhD, is Assistant Professor in the Division of Plant Pathology at Sher-e-Kashmir University of Agricultural Sciences and Technology, Jammu and Kashmir, India. He has been engaged for more than 12 years in teaching (both undergraduate and postgraduate levels) and research and is involved in the transfer of technology through different extension activities. He has published more than 30 research papers in national and international journals, one practical manual, and several book chapters and popular articles and has presented many research papers at international, national, and regional symposiums and seminars.
![Cover Short Courses at the Ontario Agricultural College, Guelph, Canada, 1908 [microform]: Stock and Seed Judging, Poultry Raising, Horticultural Dairying](https://bilder.buecher.de/produkte/65/65559/65559835n.jpg "Short Courses at the Ontario Agricultural College, Guelph, Canada, 1908 [microform]: Stock and Seed Judging, Poultry Raising, Horticultural Dairying")
