An equipment report on disk plows and disk harrows is provided as Section 8.2.5 of the US Army Corps of Engineers Wildlife Resources Management Manual. The report is designed to assist the Corps District or project biologist with the selection and use of types of equipment and materials available for habitat development and manipulation. Topics covered include description, operation and maintenance, limitations, and availability. Disk plows and disk harrows are pieces of equipment commonly used for primary seedbed preparation. They basically consist of circular cutting blades (disks) set on a common axle or multiple axles attached to a frame. Management objectives for using disk plows and disk harrows are stated, and benefits to wildlife habitat are discussed. The design and assembly of equipment are described and illustrated, and general specifications are provided. Three specialized types of disk plows-- the standard plow, wheatland (one-way) plow, and brushland plow--are described and compared. Methods of operation are described, and maintenance and safety requirements are given. Appropriate cautions and limitations are discussed.