A more thorough explanation:

AGRARIUM

A tax or tribute payable out of land.

Historically, agrarium was a tax imposed on landowners by the Roman Empire.

1. In ancient Rome, landowners were required to pay an agrarium to the government based on the size of their land.

2. In medieval Europe, lords would often impose an agrarium on their serfs as a form of rent for the land they worked on.

Agrarium was a tax or tribute that was paid by landowners or those who worked on the land. The examples illustrate how this tax was imposed in different historical contexts. In ancient Rome, the government imposed an agrarium on landowners, while in medieval Europe, lords imposed it on their serfs. The agrarium was a way for those in power to extract wealth from those who owned or worked on the land.