Themaria serves as the main source of crops for the kingdom of Callandranthall, being the source of some of their major exports. This mega farm is what made the kingdom into an empire, and allows them to feed millions of people across not only Callandranthall, but wider Evaladarr. Their main exports include wheat, oats, and barley, but they also export a variety of fruits and vegetables such as carrots, cabbages, peas, apples, onions, and oranges. Other, rarer crops like lumberries and pyrenips are also grown in Themaria.

Themarian irrigation uses similar technology to that of the tread walls along the border of Callandranthall. Large, treaded machines patrol the land that fulfil various tasks. During certain times of the year, they may be repurposed for a variety of things, including plowing, watering, harvesting, and just general patrolling.