I believe the answer is: <span>achieve better working conditions for farm workers
In the past, most of farm works are given to immigrants from another country since they are willing to accept very little payment. That's being said, farmers still made to live in farming territory and experience harsh working condition such as long working hours, unsanitary water, no weather protection, etc</span>
The goal of the farm labor movement was to achieve better working conditions for farm workers. One of the famous farm labor movements in the United States is the United Farm Workers of America or also known as United Farm Workers.
i am going to give a quick answer, and you can find more information for each. - large farm lands (slaves needed) - rich companies wanting more money - businesses and suppliers needing products quicker