A more thorough explanation:

Definition: Agist (pronounced uh-jist) is a verb that means to let animals graze on your land for a fee.

• The farmer agisted his neighbor's cows on his pasture for a week.
• The rancher agists horses on her land to earn extra income.

These examples show how agist is used to describe the act of allowing animals to graze on one's land for a fee. In the first example, the farmer is renting out his pasture to his neighbor's cows. In the second example, the rancher is using her land to provide a service to horse owners who need a place for their animals to graze.