1, advanced agricultural technology: The United States leads the world in agricultural technology, especially in corn planting. With its own industrial mechanized production, agricultural production has entered a new stage.

2. Superior geographical conditions: The United States has a flat and open terrain, a mild climate, fertile soil and abundant precipitation. In addition, the land is vast and sparsely populated, and the transportation is convenient. It is not only suitable for planting corn, but also convenient for sending corn to other places after planting. These geographical conditions provide a good foundation for high yield of corn.

3. Corn, the scientific name of which is Zea mays, is an annual herbaceous crop of the genus Zea in Gramineae. It is a root crop, and its underground root is the main part of the root system, which is deeply buried. The stem is composed of nodes, which is cylindrical and has hard tissue. The leaves of corn are composed of leaves and leaf sheaths.