The rest goes to pay for transporting, processing, packaging, refrigerating, storing and selling what the farmer grows. Farmers often borrow money from banks to purchase equipment, seeds, fertilizers and pesticides, then pay back their loans when they sell crops at harvest time. Each farmer's expenses depend on the crop he's growing, the weather, the size of the farm, and the farming techniques used. Most fruit grows on established trees, so fruit growers don't need to buy new seeds each year, but they do have to pay wages to thousands of seasonal workers who pick crops during the harvest. Wheat and most vegetable farmers need to buy seeds every year, but use machines for harvesting, so they spend more on planting supplies, but save on labor.
Some plants are naturally disease-resistant, so they require fewer pesticides than others.
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