The job duties of a farm manager include overseeing farming operations. In this career, your responsibilities vary somewhat depending on the type of crops or livestock that you manage. In general, you are responsible for maximizing production of either animals or crops. You may make decisions about the optimal times for plowing, planting, fertilizing, and harvesting. You may test soil, choose fertilizers or pesticides, or opt for a specific type of livestock feed to increase yield. As a farm manager, you may also oversee the acquisition and maintenance of equipment and facilities.