What allows lupine (a leguminous plant) to grow on poor sandy soils and produce a good harvest?

In all leguminous plants, nitrogen-fixing bacteria live on the roots, forming small nodules. They, one of the few on our planet, are able to assimilate nitrogen in the air, converting it into various compounds. Plants need nitrogen to grow. Receiving nitrogen compounds from bacteria, plants supply them with organic substances in return.

Lupine belongs to legumes, which means that it also has nodule bacteria that supply it with nitrogen. Therefore, his life does not depend on the content of this element in the soil.