This classic video produced in the late ’90s by Robin Bellinder, weed scientist in the Department of Horticulture at Cornell University, is now available online. The video discusses cultivators and other weed control tools and their advantages and disadvantages, based on four years of research. See also the publication, New Tools for Mechanical Weed Control in Vegetables.
New Tools for Mechanical Weed Control in Vegetables from Cornell Horticulture on Vimeo.