How did virginia tobacco planters fill their need for field workers?

They employed African slaves in the fields, is the right answer.

Explanation:

Due to the humid weather and favorable climatic conditions, the planters of the Southern States involved in Agriculture. They owned very large farms known as the Plantations. On such plantations, they grew cash crops that were labor intensive. Accordingly, to fulfill their need for labor they started buying adult men who were bodily fit and had knowledge about agriculture. So, with the help of slaves, the Southern states grew crops and traded with other nations.

the aztecs painted books and kept records