First of all, tell you what crop circle is called Crop Circle i.e. Crop rotation is called the crop cycle, for the different kinds of crops, depending on the order in the fixed time.
The biggest advantage of this is that there is a balance in your land's biological, chemical and physical conditions. And the quality and nutrients of your crops get plenty of quantity. The species of crops grown in the crop cycle between years and two years is converted into one another. For that reason, the cycle of insects and diseases from your land is easily broken and soil fertility starts increasing. Apart from this, the amount of carbon elements in the soil is also increased. And good crop can grow in your land without the use of any chemical.