What Is the system of using a different two out three fields for planting each season called?

The system of using different two out of three fields for planting each season is called crop rotation.

Here's how it works:

* Three Fields: The land is divided into three sections.

* Rotation:

* Year 1: Field 1 is planted with a crop (e.g., wheat).

* Year 2: Field 2 is planted with a crop (e.g., barley). Field 1 is left fallow (unused).

* Year 3: Field 3 is planted with a crop (e.g., legumes). Field 2 is left fallow.

This system allows the soil to rest and recover nutrients, reducing the need for fertilizers and preventing soil depletion. It also helps to control pests and diseases by disrupting their life cycles.