Briefly describes different kinds of tractors and other related machines and the work they do.
Content Note
Who needs a tractor? -- Why we need tractors -- You need a small tractor -- You need a farm tractor -- You need a combine -- You need a bulldozer -- You need a power shovel -- You need a backhoe -- You need a front loader -- You need a tractor with a crane -- You need a snow plow tractor -- You need a giant crawler.