But by the mid-century, sweeping changes in agriculture were well underway as farmers began to specialize in the raising of crops such as cotton, corn or wheat. By late in the century, revolutionary advances in farm machinery had vastly increased production of specialized crops and an extensive network of railroads had linked farmers throughout the country to markets in the east and even overseas. By raising and selling specialized crops, farmers could afford more and finer goods and achieve a much higher standard of living---but at a price.
Now farmers were no longer dependent just on the weather and on their own efforts. Their lives were increasingly controlled by banks, which had power to grant or deny loans for new machinery, and by the railroads which set the rates for shipping their crops to market. As businessmen, farmers now had to worry about national economic depressions and the influence of world supply and demand on, for example, the price of wheat in Kansas. And so by the end of the 19th century, the era of Jeffersons independent farmer had come to a close.
Questions 32 to 35 are based on the passage you have just heard.
32. What is the main topic of the passage?
33. According to the passage, what was the major change in agriculture during the 19th century?
34. What was one result of the increased use of machinery on farms in the United States?
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