In what way are legumes commonly used in agriculture?

Legumes play a vital role in agriculture primarily due to their ability to fix nitrogen in the soil. This unique capability is a result of a symbiotic relationship with specific bacteria known as rhizobia, which reside in their root nodules. Through this process, legumes convert atmospheric nitrogen into a form that plants can readily use, thus enriching the soil and improving its fertility. This is particularly beneficial in crop rotation and sustainable farming practices, as it reduces the necessity for chemical fertilizers, promotes healthier soil, and supports biodiversity.

In contrast, while legumes are indeed used as forage for livestock and can serve as cover crops for soil protection, these uses are secondary to their critical function in nitrogen fixation. Additionally, their ornamental value is minimal compared to their agricultural significance. This foundational role in enhancing soil health makes legumes a cornerstone of sustainable agricultural practices.