Interesting Things with JC #219: "Disc Harrows" are farming implements, or tools, used to prepare the soil for planting or sowing crops. They are pulled behind tractors and break up the clods and surface crusts on your land. This helps improve soil granulation and weed destruction. While plowing cuts, granulates, and inverts the soil, creating furrows and ridges, disking breaks up those clods and surface crusts. Let's find out more!