Modern agriculture is a funny kind of business: for months, a farmer has to take care of his crops. One blunder or stroke of bad luck, and he may lose this entire profit for the year.
Recognizing this, agribusiness is an extremely scientific discipline. Not only are fertilizers and pesticides applied rigorously, new genetically modified plants are constantly evaluated and selected.
Aside from working with soil and livestock, the business side of farming is also as sophisticated as any other business you can mention. Complex financial planning and supply chain management are standard practice.