Cleo has a vegetable garden and wants to increase the amount of nitrogen in the soil. How can she most likely do this?

Soybean plants are legumes, and legumes have root nodules containing bacteria that convert nitrogen from the air into forms plants can use. Adding soybean plants can therefore increase the nitrogen available in the soil. Reducing decomposers or fertilizers would not increase soil nitrogen, and continuous harvesting can remove nutrients from the garden.

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