The South continued to focus in agriculture. However, compared to the pre-civil war era, slaves were now allowed to make their own decisions. Most landowners have sold their lands. Slaves transitioned to paid laborers. They were given more freedom to choose the job that was made available to them during this time.
Continental System, buddy. Look it up
A lack of railroads affected a lot of things. For example like getting supplies or not having job opportunities due to not having a railroad. Also without have a railroad it made traveling harder.