Final answer:
The success of farmers in the mid 1800's was due to the arrival of a railroad network, advancements in farming technologies, and land availability.
Step-by-step explanation:
In the mid 1800's, several factors contributed to the success of farmers. One key factor was the arrival of a more extensive railroad network, which brought supplies like lumber and farm machinery to farmers.
The development of new farming technologies, such as the improved steel-faced plow by James Oliver and advancements in hay mowers and threshing machines, also greatly improved farm production. Additionally, the availability of land and the ability to purchase land near railroads played a role in the success of farmers.