What are the three-toothed harrow, sickle, shovel and hoe for? Which ones are still in use? Compared with wooden or stone farm tools, iron farm tools have the following advantages.

Three-toothed harrow is used to loosen the soil artificially and level the soil. Screening out the roots and sickles of old crops means cutting grass and harvesting crops: samarium is loosening the soil. A hoe is to remove weeds and seedlings. Iron farm tools, wood farm tools and stone farm tools are traditional farm tools in China. As far as shortcomings are concerned. I believe that the more traditional it is, the more natural it is for human beings.