Robert Fulton is best known for his improvement of the steamboat, which had a significant impact on farmers. His efforts in developing an efficient steamboat allowed for the cheap and rapid transportation of crops and goods along rivers. This improved transportation method reduced the costs of moving agricultural products from rural areas to urban markets, facilitating trade and helping farmers expand their reach.
Fulton's innovations did not directly involve canal systems or better roadways. While canals and roads were important for agricultural development, they were not primarily attributed to him. Instead, Fulton's steamboat advancements greatly enhanced the overall economic landscape for farmers by enabling easier access to markets and improving the distribution of their products.
In conclusion, the correct statement regarding Robert Fulton's impact on farmers is: His improvement of the steamboat allowed for cheap transportation of crops.