Our food doesn't just come from a store. Even the most processed foods start as crops or livestock, on a farm somewhere. Farmers and agricultural managers have an obligation to maintain responsible methods of growing fruits, vegetables, grain, and/or livestock for the purpose of eventual cultivating to be consumed in some capacity. The size and diversity of a particular farm or ranch's operation is usually dictated by its mission and values. To be an effective farmer, once must have knowledge and experience in agriculture and/or animal husbandry.