United States Department of Agriculture
The Organic Agriculture Information Access is an electronic collection of historic United States Department of Agriculture (USDA) publications related to organic agriculture. In this collection, there are almost 200 documents published before 1942 (before synthetic chemicals became widely used) that contain state-of-the-art information and data that is still very pertinent for today's agriculture. Access to this data is intended to provide growers with new ideas on crop production without chemicals, as well as help researchers conserve scarce resources by avoiding unintended duplication.
Introduction DrMetcalf provides online access to information on cicadas , leafhoppers , planthoppers , spittlebugs , and treehoppers , including a searchable bibliographic database for retrieving literature on these groups, which together comprise the group Auchenorrhyncha . The database includes nearly 12,000 early publications (1741-1955). Few electronic databases cover the early literature for any insect group. Because the focal groups are common and widespread, users may find the database helpful for retrieving many older works on insects in general. DrMetcalf also includes an overview of the group Auchenorrhyncha and each of its major subgroups.