early 19th century to late 20th century publications on topics including agricultural economics and engineering, animal science, crops and their protection, food science, forestry, and soil science
provides full text from more than 100 periodicals dating as far back as 1995, in addition to indexing and abstracts for nearly 300 periodicals dating back to 1984
all aspects of ecology research, from habitats to food chains, from erosion to land reclamation, including evolutionary biology, economics, and systems analysis as they relate to ecosystems or the environment, 1982-present
