Tractor with Seed Drill 3D model 5 (Polygon mesh 3D model) is available on CGTrader for $169. Original author: 3D-Horse. Specs: 2438792 polys, 2509268 verts.
OBJ (OBJ, filesize: 80.4 MB), C4D (Cinema 4D, filesize: 27.8 MB), 3DS (3D Studio, filesize: 41.4 MB), MAX (Autodesk 3ds Max, filesize: 92.5 MB), LWO (Lightwave, filesize: 37.9 MB), MA (Autodesk Maya, filesize: 63.3 MB), HRC (Autodesk Softimage, filesize: 44 MB)