Anyone who has ever tried to plant a garden--or even grow a plant--knows it's not always an easy task. That's why farmers do what they can to ensure a healthy crop, and that includes cultivating the soil. They till it, allowing air, nutrients, and water to circulate more easily. Doing this by hand would be nearly impossible on some farms, so farmers use some fantastic machines to aid them. Readers will love learning about the big machines called cultivators through labeled photographs and bright, accessible text.