Tools and machines built to do farm work, from hand tools through powered machinery, held as their own agricultural subject distinct from the practice they enable. The tree under this category is the standard functional classification used across agricultural-engineering surveys and museum implement typologies: tillage and land preparation, planting and seeding, harvesting split between hand tool and powered machine, threshing and post-harvest processing, power/irrigation/farm infrastructure, and dairy and livestock processing equipment. Does not belong here: the method a tool serves, which is Practice own subject, or the person credited with inventing it, who is Figure own subject.