A more thorough explanation:

BASE SERVICE

Base service refers to the agricultural work that a villein tenant performs in exchange for the lord's permission to hold the land. This was a historical practice.

For example, a villein tenant might be required to work a certain number of days each year on the lord's fields, or provide a portion of their crops as rent. This was a common practice in feudal societies, where land ownership was tied to obligations of service.

Another example of base service might be the obligation to provide military service to the lord in times of war. This was known as knight-service, and was often required of knights and other nobles who held land from the king.

The examples illustrate how base service was a form of labor or tribute that was required of tenants in exchange for the right to use the lord's land. This system was common in medieval Europe, and helped to maintain the power and wealth of the ruling class. By requiring tenants to perform labor or provide goods, lords were able to maintain control over their lands and ensure a steady supply of resources.