tractors and bulldozer-excavator over white

agricultural agriculture agronomics agronomy auto background backhoe big black bucket bulldozer car clean clipped clipping collection crop cut cutout diesel different dig digger dozer dredge dredger driving earth engine equipment excavate excavator farm farming four green harvest heavy industrial industry iron isolated large lift loader machine machinery model modern mover moving new path power push red scoop scraper set shovel steel tire tractor transport transportation truck vehicle wheel white work working yellow