What impacted southern farmers during the late 18th century?

The one that impacted southern farmers during the late 18th century was: Farmers needed to cultivate diverse crops in order to compete with the North. 

During that period, the northern states started to use modern machinery for their agricultural products, which make them able to beat the southern states' products in term of price and efficiency. In order to compete, the south started to produce more variation of plants to produce

He would most likely post his laws in the city market