MEDLINE is the premier bibliographic database covering the fields of medicine, nursing, dentistry, veterinary medicine and basic research in biochemistry, endocrinology, genetics, microbiology, molecular and cellular biology, and physiology. Although it focuses primarily on human medicine, it does contain information on animal testing, research, diagnosis and treatment.
Coverage Dates: 1950 - present

This database indexes the agricultural research of the United States as well as some international agricultural research. Contains citations to journal articles, government publications, technical reports, and conference proceedings.
Coverage Dates: 1970 - present

provides quick and easy access to fact sheets, newsletters, product listings, training resources, and related information. The database indexes all articles published in Applied Turfgrass Science, Plant Health Progress, Crop Management, and Forage and Grazinglands, and thousands of web-based resources.
Coverage Dates: 1984 - present

AgEcon Search is a free, open access repository of full-text scholarly literature in agricultural and applied economics, including working papers, conference papers, and journal articles.
Coverage Dates: 1932 - present

provides full text for nearly 4,600 scholarly publications. Coverage spans virtually every area of academic study.
Coverage Dates: 1975 - present