Big farms need big machines, and crop sprayers are some of the biggest. Farmers use these timesaving devices to spread substances such as fertilizers, pesticides, and herbicides on their crops. While readers learn about the different kinds of crop sprayers, their many parts, and their importance to the farm industry, they’ll be impressed by the colorful photographs of the machines in action–including one in the air! The high-interest topic also touches on key science and technology topics.