Abstract: A multi-crop harvester/windrower farm implement may be pushed before a tractor or harvester, to harvest and/or windrow a crop. The implement includes a frame having a plurality of horizontal arms at ground level, which support and position a crop dissociating structure to uproot or sever the stalks of the crop. The implement may include a crop reel to move the uprooted or severed crop to a draper belt, which deposits the crop in a windrow outward of the tractor wheels. In one embodiment, the crop dissociating structure includes interchangeable rod weeder and sickle attachments, allowing a user to choose between uprooting the crop, or severing the stalks of the crop. A plurality of adjustment structure may be included to adjust the altitude of the crop dissociating structure with respect to the crop, facilitating use of the implement on multiple crops. The rod weeder, crop reel, sickle, and draper belt may be driven to rotate by hydraulic motors attached to the PTO system of the tractor or harvester.