Legumes are used for food, forage and medicinal purposes. Beans, peas, and peanuts are types of legumes that are used for food. Alfalfa and clover are types of legumes that are used for forage. Legumes grow in most parts of the world. Types of legumes vary ubiquitously and might come in the form of trees, shrubs, or herbs.
Legumes take nitrogen into their roots from the air.
In the roots there is a bacteria, called rhizobia, living in nodules. The plant and bacteria have a beneficial relationship toward each other. The plant supplies the bacteria with carbohydrates and other organic compounds. In result many farmers rotate crops every other year, one year a legume crop, the next year a nonlegume crop. For my report I choose the species of Alfalfa.