What is a tract of land used to raise livestock or crops?

The word you're looking for is pasture if you're talking about land for livestock, and field or farmland for land used to raise crops.

Here's a breakdown:

* Pasture: A piece of land covered in grass or other forage plants specifically used for grazing livestock like cows, sheep, or goats.

* Field: A piece of land that is cultivated for growing crops. This could include a wide variety of crops like wheat, corn, vegetables, or fruits.

* Farmland: A broader term referring to any land used for agricultural purposes, including pastures, fields, and areas for raising animals.

The specific term you use will depend on the context and what you're trying to describe.